Is a biparietal diameter of 79 mm at 30 weeks of pregnancy normal?

Whether a biparietal diameter (BPD) of 79 mm at 30 weeks of gestation is normal depends on the specific circumstances and cannot be generalized.

1. Normal

A BPD of 79 mm at 30 weeks of pregnancy corresponds to the average BPD value of a 32-week-old fetus. If there are no pregnancy complications and the mother has a good appetite leading to faster-than-average fetal growth, this may be considered normal as long as the fetus is developing properly within the uterus and the BPD is consistent with the femur length. In such cases, there is generally no need for excessive concern.

2. Abnormal

If the fetal biparietal diameter does not match the femur length, this may indicate an abnormality, possibly due to fetal calcium deficiency. Calcium supplementation should be carried out according to medical advice in such cases.

During pregnancy, it is recommended to supplement nutrients appropriately, avoiding excessive nutrition, which could lead to overly rapid fetal growth and development.