What is the reason for the baby's abdominal circumference being larger than normal?

Patient's question:

I have an itchy lower body, and my underwear is always yellow. What's going on? What does it mean if the fetal abdomen circumference is larger than normal?

Doctor's answer:

If there is an abnormal amniotic fluid, both the abdominal circumference and fundal height may be abnormal. The condition of the amniotic fluid should still be reviewed carefully in the ultrasound report. It may be due to the fetus drinking a large amount of amniotic fluid and other contents. As long as it does not affect delivery, it is normal.
A larger baby does not mean preterm labor. Preterm labor is not related to the size of the baby but is related to the condition of the placenta and the mother's condition.
Ultrasound calculates the estimated due date based on the size of the baby, but the accurate and actual estimated due date should be calculated based on the menstrual cycle.

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