Our expert says:
The most reliable due date is taken from earlier ultrasound scans more especially those scans done between 8 weeks and 16 weeks of pregnancy. As the pregnancy advances there is greater fluctuation in the expected delivery date due to different babies growing at different rates. Not all babies are born at the same weight and therefore there is a significant variation in later pregnancy. However in early pregnancy the rate of growth is generally more uniform and therefore your early pregnancy scans should be used to fix your expected delivery date.
Answered by: Dr M.I. Cassim
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