Placental thickness for weeks: norms and deviations

Placental thickness for weeks: norms and deviations

One of the important evaluation criteria for healthy intrauterine development of the fetus is the thickness of the placenta. Deviation from norms in one or the other direction can be a sign of different pathologies.

The thickness of this organ is determined only by ultrasound. There are no other ways to measure it. The doctor-diagnostician determines the site of the largest size of the placenta and measures its thickness.

In addition to it, the maturity of this organ plays an important role in the healthy development of pregnancy. Since it is the placenta that serves the future baby for the supplier of everything necessary for intrauterine growth, deviations from the norms in its thickness threaten the fetus with complications in development.

Most often, gynecologists at the thickness of the placenta pay attention in the second half of pregnancy, after 20 weeks. Before, as practice shows, almost never there is a deviation in the development of the body. At a period of eight weeks, the average thickness of the placenta is 1, 17 cm (the minimum allowed is 0, 8, the maximum permissible is 1, 55). Its maximum thickness reaches 34 weeks of gestation, and already at 36 its growth stops and begins to decrease. Thus, the body is preparing for childbirth.

So, on the 20th week of bearing the baby, the average thickness of the placenta should be 2, 19 cm (maximum 2, 86). At 21 weeks this is 2, 28 cm, 22 - 2, 36, 23 - 2, 45, 23 - 2, 53, 25 - 2, 62, 26 - 2, 70, 27 - 2, 79, by 28 - 2, 87, by 29 - 2, 96, by 30 - 3, 04, by 31 - 3, 13, by 32 - 3, 21, by 33 - 3, 30, by 34 - 3, 38 , 35 - 3, 47. Beginning with the 36th week of pregnancy, the thickness of the placenta no longer increases, but, on the contrary, decreases, and at 37 weeks it is 3, 43 cm. At 38 weeks, this is 3, 40 cm, at 39 weeks - 3, 37 cm, 40 - 3, 35 cm.

If after an ultrasound is pregnant they diagnose "placenta hypoplasia", that is, it is a thin woman, do not worry. This is not uncommon. The cause may be a genetic predisposition or some diseases of the mother. In the latter situation, the thin placenta is treated. In other cases, a woman may receive maintenance therapy.

It is worth noting that the size of the placenta of a future mother is affected by her weight and physique. In miniature women, the thickness of the placenta may be much lower than normal. If the placenta is thicker than normal, then it is a pathology that can lead to the death of the fetus. Causes of thickening of this organ - a transferred infectious disease, gestosis, rhesus-conflict, iron deficiency anemia, diabetes mellitus. That is why women from these risk groups are always more closely monitored by obstetrician-gynecologists. In the first and second trimesters of bearing a baby, the cause of an increase in the thickness of the placenta is viral or infectious diseases.

Too fast maturing of this organ leads to its aging. Then the structure becomes lobed, calcifications are formed and the normal supply of the fetus with oxygen and nutrients ceases.

Usually, with abnormalities in the thickness of the placenta, a pregnant woman is prescribed repeated ultrasound, cardiotocography or dopplerography. And when the baby is all right, then his mom will not need treatment. It will be enough only medical control.

It is not possible to rejuvenate the placenta. But competent treatment will help improve the metabolism between this organ and the fetus, ensuring its normal development.

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