Fetal biparietal diameter femur length standard comparison table

During the ten months of pregnancy, the mother will go to the hospital for examination at certain stages, at this time she can understand whether her baby is healthy and growing. But sometimes mothers don't have enough professional knowledge of the profession. So, what is the correspondence table between the fetal biparietal diameter and the femoral head length? What are the fetal biparietal diameter and the femoral head length? Don't worry, just read the article below and you will understand.

What is the difference between fetal biparietal diameter and femoral head length?

Fetal biparietal diameter and femoral head length are two different terms. Fetal biparietal diameter is actually the baby's fetal biparietal diameter. It is a data used by doctors to determine whether there is cephalopelvic disproportion and whether the mother can give birth successfully. Fetal femur length refers to the length of the thigh bone. It is the necessary growth standard for doctors to observe whether the baby's growth and development is in the normal stage when they use B-ultrasound to examine the mother.

Correspondence table of fetal biparietal diameter and femoral head length

Generally, in the middle and late stages of pregnancy, the biparietal diameter of the fetus between 13 and 20 weeks is around 2.25-4.88, and the length of the femoral head will also increase from 1.17 to 3.35. At 21-30 weeks, the fetal biparietal diameter is 5.22-7.83 cm long, and the femoral head length will increase from 3.6 cm to 5.77 cm. By the end of pregnancy, the fetal biparietal diameter is around 8.06-9.28 cm, and the length of the femoral head will increase from 6.03 cm to 7.4 cm. However, this is not an accurate data. Because babies grow and develop differently, there will be small fluctuations during the examination. This is normal and mothers don't need to be too anxious.

Can the biparietal diameter and femoral head length be used to determine the gender of the fetus?

Some mothers want to know the gender of their baby, and also want to judge the gender of the baby based on the biparietal diameter and femoral head length. In fact, this approach is unreasonable, because the fetal biparietal diameter and femoral head length are used to check the growth and development of the baby, so it cannot be seen through the examination of the fetal biparietal diameter and femoral head length.

Examination of the fetal biparietal diameter and femoral head length can help parents better understand the baby's condition and understand what method to use to deliver the baby at full term to help the baby come into this world. However, the situation of each baby is different, and the mother does not need to judge whether the child is developing healthily after one examination.