What are the normal values for fetal biparietal diameter and femoral length? The 32nd week of pregnancy is a critical period in fetal development. At this time, the fetus has completed the development of most organs and is undergoing rapid weight gain and cell division. Monitoring the growth and development of the fetus can help understand the health of the fetus. Biparietal diameter and femoral length are important indicators for assessing fetal growth. Biparietal diameter Biparietal diameter refers to the diameter from the widest point on both sides of the fetal skull, usually expressed as BPD. The normal value of BPD is 7.9cm~9.5cm. If the biparietal diameter is too large or too small, it may indicate poor or overgrowth of the fetus. biparietal diameter