Question
I am four months pregnant and would like to know what the usual biparietal diameter is for a female fetus at this time?
Answer
Generally, at four months pregnant, the biparietal diameter of a female fetus is slightly smaller than that of a male fetus. According to your description, a biparietal diameter of 4.1 centimeters at four months is normal. It’s important to note that predicting the fetus’s gender based solely on the biparietal diameter is unreliable. The accurate method is to undergo a color Doppler ultrasound examination. Additionally, since gender determination is illegal in many areas, hospitals typically do not inform patients of the fetus’s gender. Regular prenatal check-ups should be scheduled during pregnancy.