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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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How To Know The Date Of LMP And Conception?

Hi there I need some help figuring this out. My LMp was April 26 2011 and the doctors are saying it was May 13 when I know for a fact it wasn't since my period never came in May. They set my due date at February 17 2012, just wondering when conception would of been. There was also a big discrepancy with my first ultrasound first stating I was 9 weeks then was told a couple weeks later I was actually 13 weeks. My doctor isn't any help and what he says goes. Can anyone help me please?
Fri, 30 Jan 2015
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OBGYN 's  Response
Hello,
The first ultrasound done withing 12 weeks is the most accurate in terms of dating scan. If your due was given as feb, then the lmp is indeed in may. With the lmp in april, your due date should be early feb. With the discrepancies, i would say to follow the dates of the first ultrasound. Possibility of a delayed conception is rare but possible.
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How To Know The Date Of LMP And Conception?

Hello, The first ultrasound done withing 12 weeks is the most accurate in terms of dating scan. If your due was given as feb, then the lmp is indeed in may. With the lmp in april, your due date should be early feb. With the discrepancies, i would say to follow the dates of the first ultrasound. Possibility of a delayed conception is rare but possible.