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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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How To Calculate The Exact Day Of Conception?

Hello, I am currently pregnant (33 weeks & 6 days). My last menstrual cycle was oct 22nd,2015 and lasted until oct 26th,2015. I had unprotected sex with guy A on oct 27th and took plan b contraceptive oct 29th. Two weeks later I had unprotected sex with guy B on Nov. 9th and 13th (no contraception used). On Nov. 27th I got a positive pregnancy test. Who could be the father of my child?
Thu, 30 Jan 2020
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General & Family Physician,  's  Response
Hi,

Gentleman 'B' seems to be the father of your unborn child. For a woman with a regular period, conception usually occurs about 11-21 days after the first day of the last menstrual cycle. Assuming your cycles to be regular (28 days) and with the given first date of your last menstrual period October 22, 2015 the possible dates of sexual intercourse that led to the pregnancy are between Oct 28, 2019 - Nov 12, 2019. So accordingly, the gentleman 'B' seems to be the father of your unborn child.

Hope I have answered your question. Let me know if I can assist you further.

Regards,
Dr. Mohammed Taher Ali, General & Family Physician
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How To Calculate The Exact Day Of Conception?

Hi, Gentleman B seems to be the father of your unborn child. For a woman with a regular period, conception usually occurs about 11-21 days after the first day of the last menstrual cycle. Assuming your cycles to be regular (28 days) and with the given first date of your last menstrual period October 22, 2015 the possible dates of sexual intercourse that led to the pregnancy are between Oct 28, 2019 - Nov 12, 2019. So accordingly, the gentleman B seems to be the father of your unborn child. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Mohammed Taher Ali, General & Family Physician