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Dr. Andrew Rynne
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Dr. Andrew Rynne

Family Physician

Exp 50 years

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How To Find Exact Date Of Conception?

im in a horrible situation I moved out of my ex boyfriends house by oct 20th and met a guy very shortly after I had intercourse with him the first week of nov. I found out I was pregnant and my ogyn said my conception dat is oct 31st witch is impossible because I had sex before the 20 of oct and the first week of nov with the new guy I met. so im confused about id the baby belongs to my ex or my current boyfriend.
Tue, 27 Dec 2016
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OBGYN,  's  Response
Hallow Dear,

If you are having regular menses, it would be easier and simpler for you to figure out the date of conception.

The egg release (ovulation) takes place 14 days prior to next expected menses. So you can calculate the date of your ovulation. The intercourse which is around (plus or minus 4 days) the date of ovulation is responsible for the conception.

Since there is difference of about 15-20 days between the two intercourses, ultrasonography can give your approximate date of conception (rather the age of the baby). This also can help you figuring out which intercourse is responsible for this pregnancy.

The fool proof evidence you can have about the paternity of this baby is by DNA test.

I hope this helps you to resolve your dilemma.

Dr. Nishikant Shrotri
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How To Find Exact Date Of Conception?

Hallow Dear, If you are having regular menses, it would be easier and simpler for you to figure out the date of conception. The egg release (ovulation) takes place 14 days prior to next expected menses. So you can calculate the date of your ovulation. The intercourse which is around (plus or minus 4 days) the date of ovulation is responsible for the conception. Since there is difference of about 15-20 days between the two intercourses, ultrasonography can give your approximate date of conception (rather the age of the baby). This also can help you figuring out which intercourse is responsible for this pregnancy. The fool proof evidence you can have about the paternity of this baby is by DNA test. I hope this helps you to resolve your dilemma. Dr. Nishikant Shrotri