Patient's question:
I would like to ask what is the biparietal diameter? At 15 weeks, the biparietal diameter of the fetus is 3.4 cm, and the femur length is 1.5 cm. Is this normal?Is the femur length too short? Will the legs be short when the child grows up?
Doctor's answer:
Hello, in your case, the main focus is on examining the development of the child's head. For specific details, at full term, the BPD should be 9.3 cm or more. According to general patterns, after the 5th month of pregnancy, the BPD is usually consistent with the gestational age. For example, at 28 weeks (7 months), the BPD is approximately 7.0 cm, and at 32 weeks (8 months), it is about 8.0 cm, and so on. After the 8th month of pregnancy, an average growth of about 0.2 cm per week is considered normal. When the CRL cannot be used to determine the estimated delivery date in the early stages, the BPD is often used to predict it. In the middle stages, this data is also often needed to estimate the fetal weight.