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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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How Can Pregnancy Due Date Be Calculated?

I m 36 weeks pregnant and my due date as given by the doctor is 9th november. But the recent ultra sound scan report says the due date is 28th november? Previous ultra sound scan reports detected dates very closer to 9th november. What is the reason for this big date gap and does it normal? What would be the accurate due date? Please explain
Wed, 23 Nov 2016
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General & Family Physician 's  Response
Hi. Thanks for posting on hcm.
Usually the expected date Is calculated with last menstrual period or the scan which is dine in the first trimester around 18 weeks. Later on the expected date from the scan done after the first trimester depends on the weight of the fetus and is not accurate. In your case your expected date is around 9th november.
hope this Is helpful to you
Regards
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How Can Pregnancy Due Date Be Calculated?

Hi. Thanks for posting on hcm. Usually the expected date Is calculated with last menstrual period or the scan which is dine in the first trimester around 18 weeks. Later on the expected date from the scan done after the first trimester depends on the weight of the fetus and is not accurate. In your case your expected date is around 9th november. hope this Is helpful to you Regards