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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 Date Of Conception?

Hello, I am trying to identify a conception date. I had sex with two different men 6 days apart. One on September 20 and the other on September 26. My due date is June 18. While I am aware that both men could possibly fall into that window, I figured it was worth a shot to maybe get an idea of who could be the father. My estimated LMP was sept. 12 but that s a complete guess. But I DID have a period in early September. Could anyone possibly help?
Mon, 14 Mar 2016
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General & Family Physician,  's  Response

Hi & Welcome to HCM.
I can understand your concern regarding who would be the father of your unborn child.
As per the data given in your history, the possible dates of conception would have been between September 22 to 30 with a probable date of ovulation being September 26 and the first day of your LMP being September 12.
So, the SECOND gentleman with whom you appeared to have sex on September 26 seems to be the father of your unborn child. However, a paternity test will give 100% confirmatory result about the actual biological father. Hope I could answer your query.
A feed back is appreciated.
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How To Calculate The Exact Date Of Conception?

Hi & Welcome to HCM. I can understand your concern regarding who would be the father of your unborn child. As per the data given in your history, the possible dates of conception would have been between September 22 to 30 with a probable date of ovulation being September 26 and the first day of your LMP being September 12. So, the SECOND gentleman with whom you appeared to have sex on September 26 seems to be the father of your unborn child. However, a paternity test will give 100% confirmatory result about the actual biological father. Hope I could answer your query. A feed back is appreciated.