Medical Questions > Pregnancy Forum > Pregnancy Calendar Conception : When did I Conceive ? Forum

Who is the father?

My last period was on the 16th of Dec and ended the 20th. Iv been having regular unprotected sex for months with him and nothings happened, I have previously fell pregnant by him although it took 8 months of trying. We was having sex from the 16th Dec continuously til the 2nd of Jan, then stupidly I had a one night stand on the 9th Jan... Who is more likely to be the father? I took a test on 25th Jan and it was positive, currently 27 weeks pregnant. Please help.
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replied June 23rd, 2010
Especially eHealthy
Lawren, What is your due date, when and how was it determined?
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replied June 24th, 2010
My EDD is 22/09/10. At the 12 week scan this was the date they gave me and at the 20 week scan the date was confirmed.
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replied June 24th, 2010
Especially eHealthy
That will mean that your doctor thinks that you ovulated/conceived around Dec 30. That will mean that intercourse around Dec 26 to Dec 31 could have gotten you pregnant. At 12 weeks the scan can be off by as much as 5 days. That will move the latest date for baby making sex to Jan 6 and the earliest to Dec 21.

With your LMP date it however looks like the Dec 30 date is more or less correct. So Mr ONS on Jan 9 is very very unlikely to be the father of your baby.

Take care!
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