At 32 weeks, the normal value of biparietal diameter is 7.8cm to 8.9cm. Biparietal diameter is a measurement of the diameter of the fetal head, which refers to the length of the widest part of the fetal head between the right and left sides, i.e., the distance between the temples on both sides of the fetal head. Generally 32 weeks of pregnancy belongs to the late stage of pregnancy, and the standard value of fetal biparietal diameter at 32 weeks is usually in the range of 7.8cm to 8.9cm. In clinical work, doctors will not only measure the biparietal diameter, but also through ultrasound, measure the head circumference, abdominal circumference and femur length of the fetus to determine the size of the fetus. The head circumference refers to the circumference of the fetal head, which is more accurate in determining the size of the fetal head compared to the biparietal diameter. If the biparietal diameter measurement is abnormal, it is usually necessary to measure the fetal head circumference to see if the fetal head circumference is normal and if there is any abnormality in the development of the fetal head.