How does the abdominal circumference change during pregnancy?

A growing abdomen is an indispensable and very welcome sign of pregnancy. It is understandable, because the fetus is gradually growing, which means that the belly also grows in size. The size of the abdomen during the period of gestation of the baby is determined by two important parameters - the height of the location of the bottom of the uterus and the abdominal circumference during pregnancy. In this article, we will talk about the norm of the abdominal circumference during pregnancy, list which factors affect the growth of the abdomen during the gestation of the baby, and how the abdominal circumference changes during the weeks of pregnancy.

The norm of the circumference of the abdomen during pregnancy

The doctor measures the abdominal circumference during the next examination of the future mummy and on the dynamics of the values ​​reveals the absence or presence of pathology. By the 30th week, the abdominal circumference during pregnancy should be somewhere around 85 cm, and at a later date -

about 100 cm.

Gynecologists note that the norm of the abdominal circumference in pregnancy is subjective. The height of the location of the uterine fundus should approximately correspond to the gestational age in weeks. At 20 weeks, the height of the bottom of the uterus is 20 cm, and at 32 weeks the uterus is already located between the navel and the breastbone. The size of the abdomen during pregnancy gradually increases simultaneously with the height of the location of the uterine fundus.

For these figures, you can calculate the approximate weight of the fetus. To do this, the obtained value must be multiplied by the height of the placement of the uterine fundus. Gynecologists say that the error of this method is somewhere around 150 grams. But some pregnant women call a big error, sometimes even up to a kilogram.

This may be due to the fact that the index of the circumference of the stomach is affected by additional factors( the circumference before the onset of pregnancy, the type of presentation, the growth rate of the fetus, etc.).

According to the dynamics of changes in the circumference of the abdomen, weeks of pregnancy can reveal polyhydramnios or lack of water and take the necessary measures in a timely manner. Making measurements is very simple even at home:

  • before measurement, empty the bladder;
  • measurement of the abdominal circumference should be done lying on a flat and firm surface;
  • keep your legs straight, do not bend at the knees;
  • measure the abdomen in the navel area in front and the lumbar deflection from behind.

Secret and obvious factors of abdominal growth

Norms of abdominal circumference in pregnancy The future baby grows, gaining weight from the first week of its development, but at the beginning of pregnancy this gain is very small, and therefore does not affect the size of the stomach. For example, in the third week of pregnancy, the diameter of a fertilized egg is 2-4 mm, on the eighth - 22 mm. Ten weeks after conception, its growth is already about seven centimeters, and the weight is about 25 g.

. After a month, the embryo growth will double and the weight will quadruple. Thanks to the rapid growth of the unborn child at the end of the first trimester of pregnancy, the uterus, increasing in size, begins to protrude slightly from the lone articulation. At this time, the woman notices that the indices of the abdominal circumference gradually increase. At the 20th week of development, the fetus weighs about 300 grams, and after another month - 700-800 grams.

The most active future baby grows in the third trimester. So, at the 28th week of pregnancy, it grows to 30-35 cm and weighs at least 1000 grams, and at 36 weeks - 46-48 cm and at least 2300 g.

A little later, the abdominal growth will slow, as the fetus will not be soactively develop. It must be remembered that between the circumference of the abdomen during pregnancy and the weight of the future baby there is no direct dependence, because the size of the stomach also depends on the amount of amniotic fluid and the size of the uterus.

Throughout the pregnancy, the uterus gradually increases. If at the beginning of pregnancy it weighs about 100 g, then before birth - about a kilogram. Muscles and vessels of the uterus are actively growing in the first half of pregnancy. The size of the abdomen during pregnancy is affected by the size of the asphyxia.

The amount of amniotic fluid( amniotic fluid) influences the growth of the abdomen of the future mummy. After 30 weeks, the abdominal circumference during pregnancy reaches its maximum value.

Before giving birth, the baby "delivers" 700-800 ml of urine to the amniotic fluid. Part of it is removed, and the rest of the volume is swallowed by the child along with the waters. The volume of amniotic fluid reaches a maximum in 37-38 weeks of pregnancy, and in the last weeks of pregnancy their amount decreases to 800 ml.

Although the belly of the future mummy will be visible to others only five to six after conception, but already at the very beginning of pregnancy a woman should closely monitor her condition.

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