What formula is used to calculate the approximate weight of the fetus. Child height and weight calculator according to who

Surprisingly, we forget a lot in life, but we remember the height and weight of a born child all our lives. Probably, it is inherent in the nature of a woman-mother to know and remember these numbers, because by them, by their changes, we judge the state of health of the baby.

Weight new born child is an important indicator of its development. Therefore, the first measurement and weighing is carried out immediately or a couple of hours after birth. These indicators are carefully recorded in the journals of maternity hospitals and are recorded in a tag on the baby's handle.

There is a practice of daily weighing of infants while they are in the hospital. The medical staff carefully monitors the dynamics of the increase or decrease in size, takes measures to regulate the data. Then, having been discharged from the hospital, the parents go to the clinic for control weighing and monitor the addition of grams and centimeters by months.

Dimensions at birth

According to the standards set by the World Health Organization, the average birth weight of a boy is 3400-3500 g. And girls are born smaller - 3200-3400 g. These are average figures, in fact, the weight of children at birth is much higher or lower than WHO data.

The birth of a baby from two and a half to four and a half kilograms is considered normal. Children born with a weight below or above this data are considered premature or too large. If the parents of underweight children are not very short, and the parents of overweight children are not giants, then the children are at risk. They may have psychomotor and other disorders, neonatologist and pediatrician constantly monitor them.

The norm of weight at birth is 2500-4500 g. If the baby weighs less or more than these values, he is at risk for health

In fact, the weight of a newborn depends on many factors.

If parents are people of average build and height, then their children are born with a weight of about 3 kg, that is, within the average weight, according to WHO.
The second and third children of the same mother have a higher weight than first-born babies. Parents over 35 years old have larger children than younger ones (although there are exceptions).
A child whose mother ate inadequately during pregnancy, did not adhere to the regimen, had bad habits, will be born thin.
A pregnant woman eating fatty, sugary, high-calorie foods will give birth to a larger baby.

Weight gain up to a year

In the first days of life, the baby physiologically loses up to 250 grams. This is normal, since the baby is still not eating enough, and there are quite a lot of liquids coming out. After a few days, weight gain begins.

Calculate correct weight child by month will help a special calculator of weight and height. You can do this using formulas yourself. Calculation up to six months.

For example, such an option. The baby was born with a body weight of 3100 g, the weight at two months should be as follows: 3100 + 800 x 2 (age in months) = 4700 g.

Another variant. It is accepted that in six months the child weighs 8200 g, in 2 months the baby will grow to such sizes: 8200 - 800 x 4 (does not reach up to six months) = 5000 g.

From six months to a year, the weight of a child is calculated using a different formula.

First option: 3100 + 800 x 6 + 400 x 7 (number of months) = 10700
Second option: 8200 + 400 x 7 (number of months) = 11000

It can be seen from the examples that the calculations are approximate, each formula gives its own result. At the same time, the formulas show what weight to focus on for parents. Nature develops a child according to its own laws, and its mass may well not correspond to the calculated data.

Medical scientists have developed a special calculator with which you can easily, quickly and accurately calculate the weight and height of the baby for each month and week. For convenience, a quick calculator is placed on our website. You can use it to calculate your baby's body weight.

Deviations from the norm

Characteristic marks in the development of the baby are based on indicators of weight and height. When asked how much a child should weigh at a certain age, your pediatrician or centile tables, developed on the basis of WHO medical research, will answer you. The centile tables present indicators of the norm of weight and deviations in the direction of increase or decrease.

To estimate your child's weight or height, measure and weigh their height. Find the age of the baby in the tables, compare with the figure that you intended. In the colored "frame" of the table - indicators of the norm. Everything to the left and to the right are deviations.

For example, your child is 7 months old. Height - 68 cm, and body weight - 8 kg. These figures fall into the lilac "frame" of the table, and this is the norm.

Infants up to six months during each month add 600-800 g and grow by 2-3 cm. After six months to a year, the increase decreases slightly and ranges from 600 to 350 g and from 2 to 1.5 cm in height. These are average standards, correspond to the development healthy child. Changes in the baby, which differ in the direction of increase or decrease, indicate nutritional errors and health problems. In order to solve problems in time, it is necessary to consult a pediatrician, neurologist or endocrinologist. Therefore, it is so important to monitor the anthropometry of the child.

Table of monthly changes in weight and height of the child

Based on anthropometric data, the weight and height calculator will calculate the dimensions prescribed at a given age, calculate the body mass index, make an assessment of deviations and display indicators of the correspondence between the height and weight of the newborn. Based on these data, the pediatrician will identify possible inconsistencies and give recommendations on the nutrition, development or treatment of the baby.

The body mass index of the baby is an important indicator of development. With the help of ITM, it is possible to accurately assess whether the height, weight and age of the baby correspond to the norms for months. The formula for calculating BMI is simple, every parent can handle it:

I (index) \u003d M (mass in kg): H2 (height in m2)

The generated conclusions show how the baby grows and adds, and also gives an estimate of the weight by months. If you get an average, then the crumbs normal development he has enough food. If the weight is less or more than average, but corresponds to your family constitution, this is also normal. And underweight or even severe underweight, as well as a very large weight, speaks of a pathology, a specialist consultation is necessary.

Central table of changes in weight and height of girls

It should be noted once again that all indicators are averaged, calculated for the average child. If you get deviations from the norm, do not rush to panic, first show the baby and the calculations to your pediatrician. The doctor will evaluate the dynamics of indicators, study the condition of the crumbs, draw the right conclusions, the necessary appointments.

Reasons for underweight

Using tables, formulas, or using a calculator, you find that your baby is underweight or overweight. This is a signal to parents about nutritional problems. Until the doctor has diagnosed malnutrition, watch the baby. If the baby is inactive, drowsy, lethargic, then it is quite possible that he lacks mother's milk, which means activity, strength for growth, and harmonious development.

Pediatricians distinguish between two causes of underweight: internal and external. In a normally born child, without anomalies and injuries, internal causes are not considered. BUT external causes associated with nutritional deficiencies. Loss of weight due to a lack of nutrients will be reflected in the body of the newborn by the development of anemia, immune problems and other disorders.

The main cause of underweight is most often nutritional deficiencies. That's what you should be focusing on

Analyze the reasons why the crumbs may be underweight for his age, as well as his loss. Or, conversely, too much weight. Perhaps you are not lactating enough, the baby does not have enough milk, and he is hungry. Perhaps the baby is sucking out only the front, sparse milk. Or maybe you live in constant stress. This feeling is transferred to the child, and he fights stress with you, wasting all his energy on the struggle.

Is there enough food for the child?

To understand why Small child not gaining as much as he needs, is he eating enough, check his diapers. well-fed infant soils diapers at least three times a day, and urinates at least 8-12 times.

You can observe the baby's nutrition for a maximum of a month. Compare the graph of the dynamics of weight and height, which normally change proportionally. Check if the baby has learned activities and skills appropriate for his age.

If, apart from weight indicators, nothing in the baby worries you, if the baby is alert and active, sleeps calmly, sucks well and poops on time, then underweight may not play a decisive role - you have an absolutely normal child.

If you notice a developmental delay, this is important. For example, at 3 months, the baby does not know how to hold his head for more than 4 minutes, open his mouth when approaching the nipple. Draw conclusions, consult a doctor to take action.

Remember, boys usually gain weight faster than girls, so you should not compare the first-born son with the second child - the daughter, and run to the pediatrician in a panic that the baby weighs a couple of kilos less at the same age.

Deviation from the norm (mainly in the direction of overweight) may be in artificial children. Depending on what mixture they eat. As a rule, premium formulas are more balanced than budget lines; babies do not get fat from them.

At the pediatrician's appointment, each baby up to a year is weighed monthly and measured for growth. Why is it so important for doctors to know how a child is growing and how much he is gaining weight? What do these parameters say, and what are the anthropometric norms for children of different ages?

Where did the weight and height indicators for children come from and why are they needed?

Anthropometric data of a child are one of the main indicators of the physical development and health of children. Significant deviations from the normal values of height and weight in a child almost always indicate the development or presence of certain diseases. So, if a child under one year old with adequate nutrition does not gain weight well, then this may be one of the symptoms of rickets, anemia, immunodeficiency states, diseases of the endocrine or central nervous systems.

A significant growth retardation may indicate a lack of somatotropin growth hormone in the body, and a clear excess weight with normal growth and proper nutrition may indicate disorders in the adrenal glands, thyroid gland, and even the development of a brain tumor.

In order to detect and start treating such formidable diseases in time, doctors carefully monitor the anthropometric indicators of children from birth. Development standards are compiled by the World Health Organization on the basis of many years of research. In addition to the average standard indicator for each age, the limits of the norms were also calculated. Weight and height above this limit is considered high, and below - low. It is for such children that doctors begin to observe especially closely.

WHO table of height and weight for girls under 1 year old

According to the norms, a healthy full-term girl is born with a height of 49.2 cm and weighs 3.200 g. This is the average. The lower limit of the norm for a newborn is a height of 47.3 cm and a weight of 2.800 g, and the upper limit is located at values of 51 cm and 3.700 g, respectively. Values outside the lower and upper limits of the norm are marked as very low or too high. Doctors will observe such a newborn and, possibly, additionally examine it.

During the first month, the newborn should grow by 4.5 cm and gain a kilogram. The lower limits of the norm for a monthly girl will be 51.7 (height in cm) //3.600 (weight in grams), and the upper limits - 55.6 //4.800.

Normal indicators for a two-month-old baby: 57.1 cm and 5.100 gr. The lower limit of the norm is 55//4.500, and the upper limit is 59.1//5.800.

By three months, girls grow to 59.8 cm and weigh 5.900 grams. Low for a three-month-old baby is considered to be less than 57.7//5.200, and high is more than 61.9//6.600.

Average height and weight for a four-month-old girl: 62.1 cm and 6.400 gr. The lower limits of the norm are 59.9//5.700, the upper frames are 64.3//7.300.

By five months, girls should grow to 64 cm and weigh 6.900 grams. Low rates - parameters less than 61.8//6.100. Indicators 66.3 // 7.800 are the upper limits of the norm for a five-month-old girl.

The age of 6 months is considered an important milestone in a child's development. A six-month-old girl should grow to 65.7 cm and weigh 7.300 g. The lower limit is 63.5//6.500, and the upper limit is 68//8.300.

A seven-month-old baby grows to 67.3 cm and weighs 7.600 grams. Scores below 65// 6.800 are considered low, while scores above 69.6 //8.600 are considered high.

At eight months, the norms are: height - 68.83 cm, and 8 kg - weight. The lower limits of the norm: 66.4//7000, and the upper ones - 71.1//9000.

By nine months, growth should be 70.1 cm, and the baby should weigh 8.200 grams. Low values at this age are values less than 67.7//7.300, and high values are more than 72.6//9.300.

A ten-month-old baby, according to the norms, should be 71.5 cm tall and weigh 8.500 grams. The lower limits of the norm for ten months are 69//7.500, and the upper frames: 74//9.600.

By eleven months, a normal girl grows to 72.8 cm and weighs 8.700 grams. Indicators less than 70.3//7.700 are considered low. High will be indicators exceeding 75.3//9.900.

By the year, according to the norms, girls should grow up to 74 cm and weigh 9,000 grams. The parameters 71.4 //7.900 are considered the lower limit of the norm, and 76.6 //10.100 are considered the upper limit.

WHO table height and weightfor boys up to 1 year

The norms for boys are different from the norms for girls, as boys are usually born slightly larger. So, a healthy full-term newborn boy is usually born with a weight of 3.300 grams and a height of 49.9 cm. These figures are considered normal. The lower limit of the norm for a newborn is a height of 48 cm and a weight of 2.900 g, and the upper limit is at 51.75 cm and 3.900 g, respectively.

For the first month, the baby should grow by 4.8 cm, and gain 1200 gr. The lower limits for a monthly boy will be 52.8 (height in cm) // 3.900 (weight in grams), and the upper limits - 56.7 // 5.100.

Normal indicators for a two-month-old peanut: 58.4 cm and 5.600 gr. The lower limit of the norm: 56.4 // 4.900, and the upper - 60.4 // 6.300.

By three months, boys grow to 61.4 cm and weigh 6,400 grams. Low readings will be below 59.4// 5.700, and high readings above 63.5// 7.200.

Average height and weight for a four-month-old boy: 63.9 cm and 7000 gr. The lower frames of the norm are 61.8 // 6.300, the upper frames are 66 // 7.800.

By the age of five months, the boy should grow to 65.9 cm and weigh 6.900 grams. Low rates - parameters less than 63.8// 6.100. Indicators 68 //7.800 are the upper limits of the norm for a five-month-old baby.

By six months, the baby should grow to 67.6 cm and weigh 7.900 grams. The lower limit is 65.5//7.100, and the upper limit is 69.8//8.900.

A seven-month-old boy grows to 69.2 cm and weighs 8.300 grams. Below 67// 7.400 will be considered low, and above 71.3 //9.300 will be considered high.

At eight months, the average indicators for a boy are: height - 70.65 cm, and 8.600 g - weight. The lower limits of the norm: 68.45//7.700, and the upper ones -72.85//9.600.

By nine months, the baby should be 72 cm tall and weigh 8,900 grams. Low values will be less than 69.65// 8.000, and high values will be more than 74.3//9.900.

A ten-month-old boy should normally be 73.3 cm tall and weigh 9.200 grams. The lower limits of the norm at this age are 71//8.200, and the upper limits: 76//10.200.

By eleven months, the normal baby grows to 74.5 cm and weighs 9.400 grams. Indicators less than 72.2//8.400 are considered low. High will be indicators exceeding 76.8//10.500.

In a year, according to the norms, boys should grow up to 75.8 cm and weigh 9.700 grams. The parameters 73.5 //8.700 are considered the lower limit of the norm, and the upper limit: 78//10.800.

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Growth and weight table for girls from 1 to 10 years old

The growth of children begins to slow down as soon as the babies turn one year old, therefore, for children from one year to three, the norms are no longer determined monthly, but every three months. For children from 3 to 7 years old - once every six months, and for children aged from seven to ten years - the norms change once a year.

By the age of one and three months, a girl should normally grow to 77.5 cm and weigh 9.600 grams. The lower limits of the norm: 74.83 (height in centimeters) and 8.500 (weight in grams), the upper limits: 80.3 / / 10.900.

The next breakpoint is defined for an age of one year and six months. Norm: 80.65//10.200. Lower limit: 77.7//9.100. Upper: 83.5//11.600.

In a year and nine months, the norms for girls are 83.65 / / 10.900. Lower limit of normal: 80.6//9.600. Upper limit: 86.7//12.300.

By the age of two, girls normally grow to 86.4 cm and weigh 11,500 grams. The lower limit of the norm: 83.2//10.200. Upper limit: 89.6//13.000.

Average height and weight for babies aged 2 years 3 months: 88.3 / 12.100. Lower limit: 84.8//10.700. Upper limit: 91.7//13.700.

Girls at 2.5 years old should grow to 90.7 cm and weigh 12.700 grams. The lower limit of the norm: 86.9//11.200. Upper frames: 94.3//weight 14.400.

At 2.9 years, the average values are: 92.9 / / 13.300. Lower bounds: 89.3//11.700, upper bounds: 96.6//weight 15.100.

The growth of three-year-olds should be 95 cm, and weight - 13.900 gr. Data less than 91.3//12.200 is considered low, while values above 98.8//15.800 are high.

At 3.5 years old, the standards for a girl are: 99//15.000. The lower limit is 95//13.100 and the upper limit is 103.1//17.200.

Average height and weight for a four-year-old girl: 102.6//16.100. The lower limits of the norm: 98.4//14.000, and the upper height and weight: 107.1//18.500.

At 4.5 years old, the standards for a girl: 106.2 / / 17.200. The lower limits are 101.6//14.900 and the upper limits are 110.7//19.900.

Average height and weight for a five-year-old girl: 109.4//18.200. The lower limits of the norm: 104.7//15.800, and the upper ones: 114.2//21.200.

At 5.5 years old, girls should grow to 112.2 cm and weigh 19,000 grams. Parameters less than 107.2//16.600 are considered low, while parameters greater than 117.1//22.200 are considered high.

Standards for six-year-olds: 115.1//20.200. Lower limits: 110//17.500. Upper - 120.2//23.500.

By the age of 6.5, girls grow up to 118 cm and weigh 21.200 grams. The lower limits at 6.5 years are 112.7//18.300, and the upper ones are 123.3// weight 24.900.

Average height and weight for seven-year-old girls: 120.8 and 23,000. Lower limits: 115.3//21.300, upper limits: 126.3//26.300.

In children older than seven years of age, anthropometric indicators are monitored once a year. Standards for eight-year-old girls - 126.6//25.000. The lower limit for eight-year-olds will be 120.8 and 21.400. The upper limit is 132.4//30.000.

Norms for nine-year-olds: 132.45//28.200. Lower limits: 132.5 and 27.900, upper - 138.6 / / weight 34.000.

A ten-year-old girl, on average, should have a height of 138.55 cm and a weight of 31.900 grams. Data less than 132.2//27.100 are considered low, while values above 145//38.200 are considered high.

Table of height and weight for boys from 1 to 10 years

Boys at 1.3 years old should reach the parameters 80//10.400. Lower normal value: 76.55 (height in centimeters) and 9.200 (weight in grams), upper frames: 82//11.500.

The next milestone is a year and six months. The standard for the year and six is 82.3//10.900. From the border: 79.6//9.800. To: 85//12.200.

At 1.9 years old, the standards for boys are 85.2//11.500. From the border: 82.4//10.300. To: 88//12.900.

By the age of two years, normal peanuts reach 88//12.200. From the border: 84.4//10.800. Up to 90.5//13.600.

The standard for a baby at 2.3 years: 89.6 / / 12.700. From: 86.5//11.300, to: 92.8//14.300.

By 2.5 years old, the little one should grow to 91.9 cm and weigh 13.300 grams. Lower frames for this age: 88.5//11.800. Upper frames: 95.4//15.000.

At the age of 2.9 years, the standards are - 94.1 / 13.800. Lower limits 91//12.300, upper limits 97.6//15.600.

The height of boys at 3 years old should be 96.1 cm, weight - 14.300 gr. Scores under 92.4//12.700 will be rated as low, and scores over 100//16.200 as high.

At 3.5 years old, the norm for boys: 99.9 / / 15.300. From the border: 95.9//13.600, to: 103.8//17.400.

Average height and weight for a four year old boy: 103.3//16.300. From the border: 99.1//14.400, to: 107.5//18.600.

At 4.5 years old, the boy's height reaches 107 cm, and the normal weight should be 17.300 g. The lower bar of the norm: 102.25//15.200, and the upper one: 111.1//19.900.

Standards for boys at 5 years old: 110//18.300. From bar in: 105.3//16.000 cm, to: 114.6 and 21.000.

By the age of 5.5, the standards for boys are -113//19.400. For 5.5 years, indicators less than 108.2//17.000 are considered low, and more than 117.7//22.200 are considered high.

Average height and weight for six-year-olds: 116/20.500. Bottom bar: 111//18.000. Upper: 120.9//23.500.

By the age of 6.5, boys reach the parameters 119//21.700. The lower limits for this age are 113.8//19.000, and the upper ones are 124//24.900.

Norms for seven-year-old boys: 121.8 / / 22.900. From plank in: 116.4//20.000 cm to: 127//26.400 cm.

By the age of eight, the guys grow up to 127.3 cm and have a weight of 25.400 grams. The lower bar of the norm for eight-year-olds will be 121.5 / / 22.100. Upper - 132.8//29.500.

Average height and weight for nine-year-olds: 132.6 / 28.100. Lower limits: 126.6//2.300, upper limits - 138.6//33.000.

At the age of 10, boys should normally reach the parameters 137.8//31.200. Numbers below 131.4 and 26.700 are considered low, while numbers above 144.2//37.000 are high.

Table of height and weight for teenage girls

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In adolescents, anthropometric data are monitored once a year. For an eleven-year-old girl, the averages are 144.5 (height in centimeters) / / 34.4 (weight in kilograms). Parameters less than 136.2//27.8 are considered the lower normative limits, and parameters more than 153.2//44.6 are considered the upper ones.

Average height and weight for a twelve year old: 150//40.7. Lower limit of the norm: 142.2//31.8, upper: 162.2//51.8.

A thirteen-year-old girl normally has the following indicators: 155.8//44.3. Lower data bar: 148.3//38.7, upper: 163.7//59.

At the age of 14, the average data for a girl: 159.5 / / 53.1. The lower limits of the norm: 152.6//43.8, upper: 167.2//64.

By the age of fifteen, the average height of girls reaches 161.6 cm, and the average weight is 55.5 kg. Lower limit of data: 154.4//46.8, upper: 169.2//66.5.

Average height and weight for sixteen-year-old girls: 162.4 / / 56.5. Lower limit: 155.2//48.4, upper - 170.2//67.6.

For girls at the age of 17, the standard is 163.9//61. Lower limit: 155.8//52.8, upper: 170.5//68.

Table of height and weight for teenage boys

Boys between the ages of 10 and 14 years are slightly behind girls in growth, this is normal, since hormonal changes in boys begin a little later than in girls. But after fourteen years, guys begin to grow more intensively than girls, and by the age of 15 they overtake them in terms of growth.

In adolescence, anthropometric indicators significantly depend on genetic predisposition, therefore, when monitoring the physical development of adolescents, it is recommended to focus not so much on the average, but on the limits of the norm indicated for each age and on the child's heredity. So, if the father of a young man has a height of 190 cm, then the height of 182 cm of the teenager himself at the age of 15 can be considered the norm in this case.

For an 11-year-old boy, the average figures are: 143.5 (height in centimeters) / / 35.5 (weight in kilograms). Parameters less than 134.5//28 are the lower limits of the norm, and parameters greater than 153//44.9 are the upper limits.

Average height and weight for a twelve-year-old teenager: 149 / / 39.8. From the border: 140//30.7, to: 159.6//50.6.

A thirteen-year-old teenager normally has the following indicators: 155.5//44.3. From the border: 145.7//33.9, to: 166//59.

At the age of 14, the average indicators are 161.9//49.7. From the border: 152.3//38, to: 172//63.4.

By the age of fifteen, the average height of the guys is 168 cm, and the weight is 55.5 kg. From the border: 158.6//43, to: 177.6//70.

Average height and weight for sixteen-year-old boys: 172.3 / / 66.9. From the border: 163.2//48.4, to 182//76.5.

At seventeen, the average height and weight are 176.6 / / 66.9. From the border: 166.7//54.6, to: 186//80.1.

Video "The height and weight of the child, Dr. Komarovsky"

During the second half of pregnancy, the body weight of the expectant mother begins to increase dramatically. Expecting the birth of a child, a woman can add 10 to 20 kg to her usual weight. At the same time, pregnant women are interested in answers to the questions: what is the weight of the baby at the moment, and how to calculate the weight of the child in the womb? It is quite difficult to answer these questions with high accuracy, although certain formulas exist.

Determination of the weight of the fetus according to the Jordania formula

The determination of the approximate weight of the fetus according to this formula is carried out after the 35th week of pregnancy. To do this, you need to know only 2 quantities:

abdominal circumference in cm (measurements are made at the level of the navel);
MFH (fundal standing height) in cm, which is measured from the top of the uterine fundus to the pubic symphysis.

The formula itself looks like this: abdominal circumference (cm) x VDM (cm) = fetal weight (g) +/- 200 g.

Where +/- 200 g - fluctuations in the approximate weight. If you have a massive skeleton, then +200g, if the bone is narrow, then -200g.

Example. The term in a pregnant woman is 37 weeks. Abdominal circumference - 93 cm, VSD - 34 cm. The estimated weight of the child is 93 x 34 = 3162 g +/- 200 g.

Determination of the weight of the fetus according to the Yakubova formula

Exactly the same data is used in this formula, only here they are first added up. How to calculate the weight of a child according to Yakubova?

Let's take the data of the same pregnant woman and get the following figures.

Fetal weight = (abdominal circumference + VSD) x 100 / 4. We substitute the data and get (93 + 34) x 100 / 4 = 3175 g. The difference with the first example was 13 grams.

other methods

In addition to these methods, there are many others. For example, the “calendar method”, in which the weight of the fetus and the gestational age are determined by the size of the uterus. For calculations by this method, you need to know the following parameters:

the width of the anterior semicircle (180 *) of the pregnant uterus in its widest part (measurements are made when the pregnant woman lies on her back);
WHDM in centimeters.

The discrepancies in the calculations by different methods are small, you have already seen this in the first two examples.

It should be understood that the data that is obtained by any of these methods are approximate and there is simply no exact formula with clear rules for calculating the weight of an embryo in the mother's womb. And knowing how to calculate the weight of a child at the moment is not so important. Of greater importance is the dynamics of the growth of the mass of the baby. It is this factor that will most fully characterize the stable and normal development of the fetus in the womb. Therefore, a pregnant woman needs to constantly monitor the dynamics of her own weight in order to be sure of a stable increase in the weight of the unborn child.

Every expectant mother, being in the joyful anticipation of meeting the long-awaited baby, will certainly worry about how her baby grows and develops. A woman is interested in what the eyes, nose, ears, hands of the baby will be like. Especially expectant mothers are interested in how much they weigh future baby. However, determining the weight of the crumbs by various methods is important not only for mothers, but also for doctors. We highlight the main reasons why it is necessary to determine the weight of the baby during pregnancy, and dwell on exactly how to do this.

The weight of the unborn baby - why is it determined during pregnancy

Acquisition of a dowry for the crumbs. The weight and height of the future baby is very important when choosing clothes for the future baby. The parents of the crumbs need to decide on what size to choose the dowry for the newborn - 50 or 56 sizes of children's clothing.
Deciding on a caesarean section. A large fetus is considered to be the weight of which at the time of 38-40 weeks of pregnancy of a woman exceeds 4000 g. In such a situation, most likely, doctors decide to conduct caesarean section. However, it is possible that the definition of weight is erroneous. There are cases when a woman was diagnosed with " large fruit”And even a“ giant fetus ”(if the weight of the crumbs exceeds 5 kg), however, a baby was born with an absolutely normal weight. The decision to allow delivery by caesarean section is made by the leading physician on the basis of observation throughout the pregnancy. One of the following factors can affect the weight of the future baby:
- heredity, if in the family of a pregnant woman someone has already had large children;
- if a woman overdoes pregnancy;
- in case the future crumbs have a tall and strong father;
- in a pregnant woman - overweight;
- the presence of diabetes in the expectant mother;
- repeated pregnancy.
Psychological calmness of the expectant mother. Any expectant mother wants to know that everything is in order with her baby. Many indicators that are important for doctors are not always clear to a woman (for example, the thickness of the collar space, etc.). However, every mother is pleased to know how her baby is gaining weight. The weight indicator gives a woman a state of comfort and absolute unity with her baby. Future mom she knows how much her baby has added, and this gives her inner strength and confidence, and the kilograms are gaining “not in vain”.

Methods for determining the weight of the fetus
There are two main ways to determine the weight of the fetus. The first hardware - using ultrasound data. The second is calculated.

Hardware method for determining the weight of the fetus. Ultrasound is a mandatory procedure for expectant mothers throughout pregnancy. Recently, mothers can admire their future baby on the monitor screen. The ultrasound function is a timely diagnosis that allows you to accurately diagnose ectopic pregnancy, fetal malformations and assess its general condition, as well as perform fetometry, which determines the size of the fetus.
For the entire pregnancy, a woman must undergo three mandatory ultrasound screenings. On the basis of an ultrasound examination, a woman is given a protocol with all the most important parameters for the development of her baby, including the weight of the baby. The program built into the ultrasound machine allows you to calculate the weight of the fetus based on statistical and experimental data. However, if the software device does not give you the weight of the baby, based on the data from the ultrasound protocol, you can independently calculate the weight of the crumbs. Using numerous calculators on the Internet.

Calculation method for determining using external measurements. Obstetrician-gynecologists use 4 basic formulas that allow doctors to easily determine the weight of the fetus on later dates pregnancy (starting from 32 weeks). It is worth noting that there may be errors in such calculations, so you should not fully rely on the result obtained.

Stroykova formula.
X \u003d (MB: K + coolant ∙ VDM) / 2

where X is the weight of the fetus;
MB - body weight of a pregnant woman, kg;

VDM - the height of the fundus of the uterus;
K-constant.
The constant is determined based on the mother's body weight. To do this, use the data of the following table.

Pregnant body weight (MB; in kg)

Constant (K)

82 and over

Based on the research conducted by the scientist A.V. Lankovitz, by determining the body weight of the fetus, the following data were obtained: the weight was correctly determined in 45.7% of newborns; with a significant error ((± 500-1000 g)) - in 16.7% of newborns; with a gross error (more than 1000 g) - in 1.5% of newborns.
Example. The weight of a pregnant woman at 33 weeks is 61 kg. The circumference of the woman's abdomen is 90 cm, and the height of the bottom of the uterus is 33 cm. Calculate the weight of the fetus:
X \u003d (61: 18 + 90 ∙ 33) / 2 \u003d 1486.69 g
Yakubova's formula. The weight of the fetus is calculated by the formula:
X \u003d (OJ + WDM) / 4 ∙ 100

where X is the weight of the fetus;
OC - the circumference of the woman's abdomen;
VDM - the height of the fundus of the uterus.
Example. The weight of a pregnant woman at 31 weeks is 58 kg. The circumference of the woman's abdomen is 86 cm, and the height of the bottom of the uterus is 31 cm. Calculate the weight of the fetus:
Х=(86+31)/4∙100=2925g.

Rudakov's formula. According to Rudakov, the length and width of the semicircle of the palpated fetus is necessary. The specified values and the resulting conditional index are substituted into the table. The index value corresponds to a certain value of the fetal weight. The table also defines a large, full-term and premature fetus for childbirth.

N - full-term fetus
M - premature fetus
B - large fruit

gestational age in weeks	Fetal volume index	Fruit weight, g

Fetal weight calculation according to R. W. Johnson and S. E. Toshach. According to scientists, to calculate the estimated weight of the fetus, it is necessary to measure the height of the fundus of the uterus above the womb. If, with the fetal head pressed down, it is 34 cm, then the average fetal weight is 3400 g. With a uterine fundus height of 35 cm, the fetal weight is 3556 g, etc. , adding 156 g for every one centimeter of fetal growth.

Determining the weight of the fetus is very important for a successful pregnancy. This indicator can be determined using an ultrasound machine, or by a calculation method using formulas. However, it is worth remembering that in each method there is a different probabilistic error.

Every conscientious parent is concerned about the correct physical development of his child - especially if it is the firstborn. The main issues that arise during the first year of a baby's life are growth and weight indicators, their normal monthly increase.

In the first months of life, the baby is rapidly gaining weight. Even if the indicators do not perfectly match the WHO data, you should not worry - each child is individual, so errors are possible

Calculator

What determines the rate of weight gain and growth?

The value of height and weight parameters is quite individual and depends on factors:

method of feeding a newborn (baby or artificial);
the amount of food consumed;
problematic history (the presence of congenital anomalies, heart defects, gastrointestinal diseases);
genetic indigestibility of some trace elements;
lifestyle (how active the child is);
gender (boy or girl).

Since weight gain and height in the first months of life occur according to an individual schedule, there is no need to worry in case of minor deviations from the parameters adopted by WHO if the child feels well, he is vigorous and active, there are no problems in development. However, significant deviations should be discussed with the doctor.

Formulas for calculating normal weight and height

Norms for height and weight for infants are calculated experimentally. In this regard, a slight deviation of indicators from the WHO tables is considered normal. Also, we must not forget about genetic inheritance.

So, large tall parents, most likely, will give birth to a “butuz”, which is ahead of their peers in weight and height. And short people are likely to become parents of a “small” child, whose topographic indicators are less than the generally accepted norm:

a newborn should normally weigh from 2.4 kg to 4.3 kg (the lower limit corresponds to the minimum for a girl, the upper to the maximum for a boy);
during the first week after birth, a physiological weight loss occurs, which can be up to 7% of the total mass;
up to 6 months, normal monthly weight gain is 800-650 g;
from 6 months to 1 year, the increase becomes less intense - about 600-350 g.

N is the number of months in the calculation period.

In the second half of life, weight is calculated using a different formula: M + 800 x 6 + 400 x (N-6), where

M is the weight of the child at the time of birth (kg);
800 x 6 - the weight that the child should ideally have acquired in the first 6 months;
N is the number of months after half a year.

About harmonious and complete physical development Doctors judge babies not so much by weight, but by the ratio of mass and height. As a rule, the weight of a newborn baby is 2.5 - 3.9 kg, and the value of normal monthly weight gain depends on these figures.

As for the growth of an infant, the minimum value for girls, according to WHO, is 45.6 kg, and the maximum parameter for a boy is 53.4 kg.

Weight and height tables up to a year

We offer a detailed table of average weight and height of children from 0 to a year. Once again, I would like to remind you that all parameters and criteria are approximate:

Age, months	Weight, kg	Weight gain, gr	Height, cm	Height gain, cm
0	3,1 - 3,4	–	50 - 51	–
1	3,7 - 4,1	600	54 - 55	3
2	4,5 - 4,9	800	55 - 59	3
3	5,2 - 5,6	800	60 - 62	2,5
4	5,9 - 6,3	750	62 - 65	2,5
5	6,5 - 6,8	700	64 - 68	2
6	7,1 - 7,4	650	66 - 70	2
7	7,6 - 8,1	600	68 - 72	2
8	8,1 - 8,5	550	69 - 74	2
9	8,6 - 9,0	500	70 - 75	1,5
10	9,1 - 9,5	450	71 - 76	1,5
11	9,5 - 10,0	400	72 - 78	1,5
12	10,0 - 10,8	350	74 - 80	1,5

Medium normal performance for girls:

Age, months	Weight, kg		Height, cm
	From	Before	From	Before
0	2,8	3,7	47,3	51
1	3,6	4,8	51,7	55,6
2	4,5	5,8	55	59,1
3	5,2	6,6	57,7	61,9
4	5,7	7,3	59,9	64,3
5	6,1	7,8	61,8	66,2
6	6,5	8,2	63,5	68
7	6,8	8,6	65	69,6
8	7,0	9,0	66,4	71,1
9	7,3	9,3	67,7	72,6
10	7,5	9,6	69	73,9
11	7,7	9,9	70,3	75,3
12	7,9	10,1	71,4	76,6

Average normal indicators for boys:

Age, months	Weight, kg		Height, cm
	From	Before	From	Before
0	2,9	3,9	48	51,8
1	3,9	5,1	52,8	56,7
2	4,9	6,3	56,4	60,4
3	5,7	7,2	59,4	63,5
4	6,2	7,8	61,8	66
5	6,7	8,4	63,8	68
6	7,1	8,8	65,5	69,8
7	7,4	9,2	67	71,3
8	7,7	9,6	68,4	72,8
9	8	9,9	69,7	74,2
10	8,2	10,2	71	75,6
11	8,4	10,5	72,2	76,9
12	8,6	10,8	73,4	78,1

Monthly weight gain and height in detail

On the Internet and social networks networks can now be found a large number of information about weight and height standards one year old babies established by WHO, presented in the form of tables and formulas, on the criteria for proper development. For most young mothers, this information becomes the main one when calculating the performance of their baby. Since each child develops according to an individual pattern and all the values \u200b\u200bof such tables are approximate, you need to focus on the monthly increase. It will be useful for young parents to familiarize themselves with the norms of weight and height gain from 0 to 1 year by month.

From birth to six months

Within 1 month after birth, the child normally adds about 600 g of weight, 2.5 - 3 cm in length, the head in circumference increases by 1.5 cm. The diet should be drawn up individually, but the best option is a three-hour interval between feedings. Breast-feeding should be a priority for harmonious development, but if the child is artificial, the mixture should be fed in a volume of 80 - 120 ml per feeding.
For 2 months, the weight gain of a newborn is 700-800 g, plus 3 cm of growth, the head circumference increases by 1.5 cm (see also:). The breaks between meals may already be slightly longer and be about 3.5 hours. If you decide to wean the baby from feeding at night during this period, then the weight will not increase so intensively.

In the second month, the child gains about 700 g of weight, active development takes place internal organs

For 3 months of life, a weight gain of 800 g and a height of 2.5 cm is characteristic, the head in circumference increases by another 1.5 cm. The feeding regime remains the same, however, for children who are on artificial feeding, it is allowed to increase the interval between feedings up to half an hour, while the volume of the mixture increases and amounts to 150 ml. It must be remembered that at this time the baby may be disturbed by intestinal colic, so there may be a violation of appetite.
At 4 months, a child can gain up to 750 g and 2.5 cm. The feeding regimen is maintained as before. In the future, the intensity of weight gain will gradually decrease.
At the end of the 5th month, the baby weighs another 700 g more than before, and growth increases by 2 cm. By this time, growth and weight indicators increase by 2 times relative to the initial ones.
At 6 months, the child adds about 650 g, and the increase in height is about 2 cm (we recommend reading:). Normally, the ratio of shoulder width to body length should be 1:4, and the circumference of the head is less than the girth of the chest. Now the interval between feedings is increasing to 4 hours. Gradually complementary foods are introduced into the child's diet. You can start with zucchini - for the first time 1/2 tsp is given. mashed potatoes, during the week the volume is brought to 50 g. By the end of the first half of the year, 1 feeding is replaced with such complementary foods.

After 6 months, the child can be introduced to vegetable purees, which modern kitchen appliances allow you to cook even at home.

From six months to 1 year

For 7 months, an increase equal to 600 g and 2 cm is typical. The baby eats according to the previous regimen, only 1 standard feeding in the morning is replaced by complementary foods - gluten-free porridge on water or one-component vegetable puree. It is necessary to accustom children to new dishes by offering them in small portions - from 1/2 tsp. at a time, gradually increasing the portion during the week and bringing the volume closer to 180 g. Otherwise, the baby may experience an allergic reaction or develop food intolerance.
At 8 months, weight gain continues, the average increase is 550 g, and growth is 2 cm. During this period, the child’s diet becomes even more diverse - the baby gets acquainted with new types of vegetables and cereals, meat purees from rabbit or turkey, yolk are introduced into the menu chicken or quail eggs.
At the end of the 9th month, the child will become 500 g heavier and 2 cm longer. Now you can add a variety of multi-component vegetable purees, fruits, fermented milk products - cottage cheese and kefir to the diet.
On average, weight gain at the end of the 10th month is another 450 g, another 1.5 - 2 cm in height. By this age, the baby can safely drink about 100 ml of fruit or vegetable juices during the day. Usually the baby is already well tolerated by bananas, peaches, plums. Porridges already need to be enriched by adding up to 5 g of vegetable or butter to them.
By the end of 11 months, the baby's weight increases by another 400 g, and height - by 1.5 cm. At this age, children are offered lean white fish for testing.
In a year, the weight of the child is: M (kg) x 3, and the length from the moment of birth should increase by 25 cm. For the harmonious development of the baby, the menu should already be quite diverse, the presence of vegetables, meat and fish is mandatory.

After overcoming the milestone of 1 year, you can not “blend” dishes, but gradually accustom the baby to “adult” chopped foods. This tactic will help develop fine motor skills and the speedy transition to an independent meal.

Pregnant body weight (MB; in kg)	Constant (K)







82 and over