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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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How Can I Find Out Who Is The Father Of My Unborn Baby?

Hi I need help determining my babys father!
My last menstrual period was August 20, 2010
I slept with my boyfriend August 13,14,15, & 26th.
i slept with my ex sept 5 & 11th.
i went to the doctor on october 8th and had an ultrasound & she said i was 7 weeks.
i got to hear the heatbeat and everything. Im still confused though on who the father might be, please help!
posted on Thu, 13 Mar 2014
Twitter Tue, 24 Nov 2015 Answered on
Twitter Wed, 25 Nov 2015 Last reviewed on
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OBGYN,  's  Response
Hi,

Your ex is the father of your baby. first trimester ultrasounds are very accurate in estimating gestational age with an error of just 1 week.
You would have had to have conceived 5 weeks before 8 October, to be 7 weeks on 8 th October.This is because we always time the pregnancy not from day of conception but the last menstrual period. So the confusion of 2 weeks, as those two weeks represent the follicular phase of the cycle you conceived in.

Hope this helps.
Regards.
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How Can I Find Out Who Is The Father Of My Unborn Baby?

Hi, Your ex is the father of your baby. first trimester ultrasounds are very accurate in estimating gestational age with an error of just 1 week. You would have had to have conceived 5 weeks before 8 October, to be 7 weeks on 8 th October.This is because we always time the pregnancy not from day of conception but the last menstrual period. So the confusion of 2 weeks, as those two weeks represent the follicular phase of the cycle you conceived in. Hope this helps. Regards.