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How To Determine The Date Of Conception?

Posted on Fri, 21 Aug 2015

Question: I had my period on XXXXXXX 8-11, then had unprotected sex on XXXXXXX 13 at which time I took Postinor 2 (both tablets at once as opposed to the 12 hour interval). My period then came again on XXXXXXX 20 and lasted 2-3 days. I then had unprotected sex again on July 4 (took Postinor 2 again, both tablets at once) and July 7 (no Postinor). My doctor has now confirmed that I'm 5-6 weeks pregnant as of July 28. I would like to know which of my intercourses has resulted in this pregnancy.

Answered by Dr. Vjollce Mbiarra (52 minutes later)

Brief Answer:
We can't confirm exactly

Detailed Answer:
Hi dear and thanks for your query.

More chances that you have conceive is 7 July,because :
1.you haven't used any protection,like postinor
2.if you where 5-6 weeks pregnant ,July 7 is a date that you have conceived

But keep in mind that we can't determine exact time or date of conception.

Use folic acid 400 mikro/gr per day in the first trimester(until your pregnancy will be 12 weeks) and be calm.

All the best

Above answer was peer-reviewed by : Dr. Shanthi.E

Follow up: Dr. Vjollce Mbiarra (6 hours later)

Was the period I got on XXXXXXX 20th a real period or just bleeding as a result of the Postinor taken on XXXXXXX 13 (because I've never had two periods that are less than two weeks away from eachother). If it was a real period, could I still have been ovulating by July 7th? I need to know in order to determine who's responsible for my pregnancy as I had two different partners. PLEASEEEEE HELP

Answered by Dr. Vjollce Mbiarra (14 hours later)

Brief Answer:
DNA test confirm father

Detailed Answer:
Hi dear again !

Use of Postinor can make periods be earlier ,hence we can calculate as last menstrual period (LMP) on 20 XXXXXXX
If LMP was on 20 XXXXXXX than is possible that you have ovulate around 5 to 7 July.
Hence more possible is you have conceived on 7 July .

But as I mentioned above ,exact time of conception can't be determine ,hence we can't determine exact father .
Exact father can be determine only by doing DNA test of father and your baby.

best regards

Above answer was peer-reviewed by : Dr. Prasad