Is the biparietal diameter at 36 weeks 83mm abnormal?

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Hello doctor. I am 36 weeks 4 days pregnant. Your baby's 36-week fetal index:
Diameter biparietal 83mm Abdominal circumference 331mm Femoral length 70mm And baby weighs about 2881 g Doctor, can I ask if the above parameters are normal? Is the biparietal diameter at 36 weeks 83mm abnormal? And will it affect the baby in the future?
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Hello, the doctor would like to answer your question about 36 weeks fetal index as follows:
Biparietal diameter BDP (English name is Biparietal diameter, abbreviated) is the BPD) is the diameter measured in the largest cross-section (from the forehead to the back of the neck) of the fetal skull or can be understood as the head diameter of the baby.
Note, the biparietal diameter is completely different from the fetal head circumference. Head circumference is a measure of the circumference of the baby's head, and biparietal diameter is a measure of the diameter of the baby's head, these two parameters are like the circumference and diameter of a circle.
In fetal ultrasound, biparietal diameter is used to estimate fetal weight, calculate gestational age, and is an indicator to assess fetal growth rate.
Your 36 week 4 day biparietal diameter provided above corresponds to gestational age.
If you are still worried, you should go to a reputable medical facility like the hospitals of Vinmec Health System to be examined and consulted by an experienced doctor. Thank you for sending your questions and concerns to Vinmec.

Answered by Master, Doctor Nguyen Van Thanh - Doctor of Obstetrics and Gynecology - Department of Obstetrics and Gynecology - Vinmec Nha Trang International General Hospital.