Biparietal diameter and femur length of the fetus at 36 weeks of pregnancy

At around 36 weeks of pregnancy, the biparietal diameter of the fetus is generally around 8.0 cm. At nine months of pregnancy, the biparietal diameter of the fetus is generally around nine centimeters. At 36 weeks, the length of the femur should be between seven centimeters. Generally, the average value is used in statistics. If the femur is shorter, it may be due to measurement errors, or it may be caused by fetal maldevelopment or calcium deficiency.

Biparietal diameter and femur length of the fetus at 36 weeks of pregnancy

Generally speaking, after the fifth month of pregnancy, the biparietal diameter of the fetus is consistent with the month. That is to say, in the eighth month of pregnancy, the biparietal diameter of the fetus is 8.0 cm, in the ninth month of pregnancy, the biparietal diameter of the fetus is 9.0 cm, and so on. The 36th week happens to be the first week of the 9th month of pregnancy, so the standard biparietal diameter of the fetus at 36 weeks should be 9.0 cm. However, the statistics of the biparietal diameter of the fetus use the average value, so the average value of the biparietal diameter of the fetus at 36 weeks is 8.81±0.57.

At 36 weeks of gestation, the femur length was 6.95±0.47. Because the fetus moves more in the mother's belly, and different fetal positions and different doctors' operations will cause errors in the data, and sometimes the fluctuations will be large. Experts say that after 30 weeks of pregnancy, an error of two weeks is allowed, so when pregnant mothers see that the report results are different from the normal values, they don't need to be too nervous.

Causes and measures for short femur length:

1. Measurement errors: When measuring the femur length after 30 weeks of pregnancy, an error of up or down two weeks is allowed. As long as it is within this range, pregnant mothers do not need to worry too much.

2. Fetal maldevelopment: If the femur length measurement is very different from the standard value, it is very likely that the fetus is maldeveloped. Pregnant women should monitor the health of their babies and themselves. If they have irregular abdominal pain, spotting, etc., they should go to the hospital for examination in time.

3. Congenital femoral length: Some fetuses have congenital femoral length differences due to genetic factors. Experts say that congenital femur length will affect the height of the baby at birth, but this situation can be changed. Now the baby's acquired nutrition has far exceeded the influence of congenital factors. Therefore, after the baby is born, try to let him drink more milk, supplement more calcium, and strengthen physical exercise, which is very helpful for the baby's height.

4. Calcium deficiency: Calcium deficiency during pregnancy may affect the length of the femur. Pregnant women are advised to supplement calcium and high-quality protein appropriately, and eat more calcium-rich foods in their diet, such as milk, lean meat, bone soup, etc. In addition, pregnant women should get more sun exposure to facilitate calcium absorption.

After the introduction of the above content, I believe everyone has a certain understanding of the 36 fetal biparietal diameter and femur length standards. It is normal for the data in this regard to have a little deviation in the late pregnancy, but if the deviation is serious, the doctor will give you advice. Pregnant women should not worry too much, listen to the doctor's advice, supplement nutrition, and wait for the baby to come.