What is the meaning of biparietal diameter?

Patient's question:

No

Doctor's answer:

1. The biparietal diameter refers to the distance between the two parietal bones of the fetus. Doctors often use it to observe the child's development, determine whether there is cephalopelvic disproportion, and ensure a smooth delivery.
2. The normal value of the biparietal diameter has a range. For example, a full-term fetus should have a biparietal diameter of 8.6-10 centimeters, with an average of 9.3 centimeters.