What is the normal value of biparietal diameter at 37 weeks of pregnancy?

In the later stages of pregnancy, doctors will measure the fetal biparietal diameter (BPD) to determine whether the fetal head development is normal and whether the pregnant woman can give birth successfully. Generally, the fetal biparietal diameter mainly refers to the widest length of the upper and lower sides of the fetal head. So, what is the standard value of the fetal biparietal diameter at 37 weeks of pregnancy? Today, the editor will tell you the details.

1. Standard value of biparietal diameter of fetus at 37 weeks of pregnancy

When the baby is full-term, the biparietal diameter of the fetus should be 9.3 cm or more. According to general regularity, after the fifth month of pregnancy, it is basically consistent with the pregnancy phase. In other words, the biparietal diameter of the fetus is about 7.0 cm at 28 weeks of pregnancy (July), about 8.0 cm at 32 weeks of pregnancy (August), and so on. After the eighth month of pregnancy, the average weekly increase of about 0.2 cm is normal. Therefore, the standard of the biparietal diameter of the fetus at 37 weeks is 9.00±0.63. In other words, at 37 weeks, the baby's biparietal diameter is 9.0 cm, the deviation is controlled at 0.63, and the range is between 8.37-9.63. If the baby's fetal biparietal diameter is within this range, it is normal, which means that the child is developing very healthily.

2. What should I do if the biparietal diameter of the fetus is too large at 37 weeks?

It may be that the mother has sufficient nutrition and good nutrient absorption, but lacks exercise. The baby will digest whatever the mother eats. If the mother does not increase the amount of exercise appropriately, she will become fat, and the baby will also be fat. Of course, the biparietal diameter of the fetus will be larger. It is also possible that there is water in the baby's head. If this happens, you need to go to the hospital immediately for treatment and perform head water pump surgery on the fetus.

3. What should I do if my baby's biparietal diameter is small at 37 weeks?

Menstrual irregularities in the pregnant mother's past can also cause the baby to have a smaller biparietal diameter. It may also be due to the gestational age limit. When comparing the biparietal diameter of a 37-week-old baby with that of a 38-week-old baby, it will naturally be smaller. If the instrument is inaccurate, it will also affect the accurate measurement results. The mother should make adjustments based on the cause of the baby's small biparietal diameter. If the fetus is malnourished, the pregnant woman should supplement nutrients, such as foods containing protein and folic acid, to make the child grow more complete and smarter.

It is very important to accurately measure the standard value of the fetal biparietal diameter. Therefore, pregnant mothers must attach great importance to the examination of the fetal biparietal diameter. If the test results show that there is a certain error between the standard value and the index value of the fetal biparietal diameter, pregnant mothers should maintain an optimistic attitude and go to the hospital for a physical examination to clarify the cause and start treatment in time to ensure the health of the fetus.