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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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How To Determine The Date Of Conception?

I had unprotected sex with my girlfriend On 21st January On the 8th day she started playing I mean to accelerate the blackmailing Story On the 11th day on 1st Feb she told me that she has done urine pregnancy test and it s positive On 23rd March she text me that she has done dating scan I mean first scan And her text was It seems two but not sure. Can you please clarify from the above that she is pregnant and If she is it could be from me??
Mon, 14 Aug 2017
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General & Family Physician,  's  Response
Hi,
Thanks for asking. I understand your concern.
She can conceive only till 23rd Jan... with the sex on 21st Jan.... that too if it was her ovulation time. ( 2 days before or two days after the ovulation are the maximum fertile days.& the ovulation is 14 days prior to expected day of her next period... )that means she should have a short cycle of 22 to 25 days if she has to conceive in given circumstances.
Urine pregnancy test ( home test ) is positive only after 8 days delay in periods.False +ve test before that is only possible in case of contaminated urine or container.
Please co relate this information by calculating in relation of the length of her menstrual cycle ( how many days it is ).
Thanks
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How To Determine The Date Of Conception?

Hi, Thanks for asking. I understand your concern. She can conceive only till 23rd Jan... with the sex on 21st Jan.... that too if it was her ovulation time. ( 2 days before or two days after the ovulation are the maximum fertile days.& the ovulation is 14 days prior to expected day of her next period... )that means she should have a short cycle of 22 to 25 days if she has to conceive in given circumstances. Urine pregnancy test ( home test ) is positive only after 8 days delay in periods.False +ve test before that is only possible in case of contaminated urine or container. Please co relate this information by calculating in relation of the length of her menstrual cycle ( how many days it is ). Thanks