Biparietal diameter, abbreviated as BPD, is the distance between the parietal protuberance on both sides of fetal head, and it is an important index to observe children's development. This paper will help expectant mothers better understand fetal development by popularizing the knowledge of biparietal diameter.

B ultrasonic monitoring

Clinically, doctors often use B-ultrasound to monitor the biparietal diameter, judge the fetal size and evaluate the success of delivery.

Be careful when you go out of range.

In ultrasound, these values are normal within 2 standard deviations, so be careful when they are out of range.

stepup

Generally speaking, after 5 months of pregnancy, BPD will gradually increase, reaching about 8.0 cm at 32 weeks of pregnancy, and then increasing by about 0.2 cm every week.

important indicator

Biparietal diameter and head circumference are important indexes to measure fetal skull development, and the smaller biparietal diameter is more common.

Make sure the baby is healthy.

If BPD is beyond the normal range, further magnetic resonance imaging or dynamic observation may be needed to ensure the health of the baby.