The bpd is the fetal biparietal diameter, which is the distance between the two parietal bones of the fetal head and the widest part of the fetal head. It is a very important indicator for fetal examination, and the measurement of the biparietal diameter is able to estimate the fetal weight as well as to determine whether the development of the fetus is normal or not.
Fetal biparietal diameter increases with each month after the mid-pregnancy period, so the measurement of biparietal diameter can usually calculate the fetal gestational week.
At the end of pregnancy, fetal weight is calculated from the biparietal diameter, as well as the fetal femur length, head circumference, and abdominal circumference, to determine whether the fetus is developing normally.
If the biparietal diameter is too large and the child is on the large side, it is important to rule out the presence of diabetes mellitus or over-nutrition of the pregnant woman. If the biparietal diameter is smaller than the gestational week and other indicators are also low, it is possible that the fetus is stunted or malnourished.
Regular checkups should be conducted during pregnancy, and any abnormalities found in the fetus should be treated by a doctor.