What if the fetal biparietal diameter is too large?

Bigger biparietal diameter of the fetus is a sign of fetal growth, which is directly related to the expectant mother's good nutrition and little activity, indicating that the expectant mother's adequate nutrition leads to bigger fetal growth, which is a common manifestation now, so don't worry, as long as there is no abnormality in the fetal head, you can rest assured.

Fetal biparietal diameter is too large.

If the fetal biparietal diameter is too large, hydrocephalus should be considered first. It is suggested to check the fetal brain when doing B-ultrasound to rule out the possibility of abnormal development of the baby.

Normal range of biparietal diameter

The biparietal diameter of the fetus should reach 9.3 cm or more at full term. According to the general rule, after 5 months of pregnancy, it basically coincides with the month of pregnancy, that is, the BPD of 28 weeks (7 months) is about 7.0 cm, and that of 32 weeks (8 months) is about 8.0 cm, and so on.

The growth law of bimodal diameter

After 8 months of pregnancy, it is normal to grow about 0.2 cm per week on average. When CRL can not be used to determine the expected delivery date in the early stage, BPD is usually used to predict. After the middle period, it is often necessary to measure these data when estimating fetal weight.

Hospital examination

After reading the above introduction, I believe everyone knows whether the biparietal diameter will grow after full term, so parents don't have to worry too much, but if the biparietal diameter is too large, they should also consider whether there will be hydrocephalus, or go to the hospital for further examination, don't miss any abnormal conditions, and find treatment as soon as possible.