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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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How To Confirm The Date Of Conception?

I had sex on the 19th and 24th of July with 2 different guys. I have irregular periods & my last period was June 7th-12th. I had a positive pregnancy test and went to my first appointment on August 27th, 2015 which measures the baby at 0.65cm & me being 6 weeks 4 days. My expected due date is April 17th, 2016 & that puts my period at July 12th, 2015 says the doctor. Can you help me figure out which partner may be the father and when I conceived.
posted on Tue, 24 Nov 2015
Twitter Sun, 27 Dec 2015 Answered on
Twitter Tue, 29 Dec 2015 Last reviewed on
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General & Family Physician,  's  Response
Hi,
Thanks for posting in HCM.
I understand your concern.
It is difficult to predict when would you ovulate when you have irregular periods. Hence, it is difficult to tell who could be the father as it is not possible to predict which event could have fertilised and you have conceived.
Kindly go by the gestational age as predicted by ultrasound scan and take the given expected date of delivery (EDD). Delivery might happen +/- a week to ten days from EDD.
You can only come to know who could be the father following delivery by doing paternity test using DNA fingerprinting.
Hope the information provided would be helpful.
All the best.
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How To Confirm The Date Of Conception?

Hi, Thanks for posting in HCM. I understand your concern. It is difficult to predict when would you ovulate when you have irregular periods. Hence, it is difficult to tell who could be the father as it is not possible to predict which event could have fertilised and you have conceived. Kindly go by the gestational age as predicted by ultrasound scan and take the given expected date of delivery (EDD). Delivery might happen +/- a week to ten days from EDD. You can only come to know who could be the father following delivery by doing paternity test using DNA fingerprinting. Hope the information provided would be helpful. All the best.