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How To Determine The Paternity Of The Fetus?

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Posted on Thu, 16 Jun 2016
Question: If I am pregnant and had intercourse on two separate occasions with two different men a month apart can I determine who the father is?
doctor
Answered by Dr. Archana Verma (17 minutes later)
Brief Answer:
Check for the gestational age by ultrasound examination

Detailed Answer:
Hi

I understand your concerns but don't worry. You may check for the gestational age of fetus by your ultrasound examination. This will give you an idea about the start of pregnancy and the father of your baby. Also, DNA analysis of fetus can be done after 9 weeks of gestation to give you the most definitive answer.

Hopefully it will be of help.
Take care
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
doctor
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Follow up: Dr. Archana Verma (7 minutes later)
I did receive the due date of November 19,2016, the two occasions were 1/31/16 and 2/29/16 ...I looked up possible conception dates and it says feb 28th. What is the probability the child is the man I slept with on 2/29? Could an ultrasound at 8 weeks 5 days possibly be off three to four weeks?
doctor
Answered by Dr. Archana Verma (5 minutes later)
Brief Answer:
Ultrasound more accurate during the initial 3 months

Detailed Answer:
Hi

Ultrasound gives an accurate age of fetus with variation of 1-2 weeks but not more in the first trimester. So, the day of conception was most likely 2/29/2016 for you.
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
doctor
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Follow up: Dr. Archana Verma (18 minutes later)
Would you also take into account that I used a condom with the man in January, I also believe I had my period feb 6th I had put it in my phone. What percent chances do you feel it would be the man on 2/29
doctor
Answered by Dr. Archana Verma (14 minutes later)
Brief Answer:
Its certainly on 2/29

Detailed Answer:
Hi

These facts are all in favour of conception on 2/29. It's almost 100%.
Note: For detailed guidance on genetic screening consult a genetics specialist

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Answered by
Dr.
Dr. Archana Verma

Pediatrician

Practicing since :2006

Answered : 1129 Questions

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How To Determine The Paternity Of The Fetus?

Brief Answer: Check for the gestational age by ultrasound examination Detailed Answer: Hi I understand your concerns but don't worry. You may check for the gestational age of fetus by your ultrasound examination. This will give you an idea about the start of pregnancy and the father of your baby. Also, DNA analysis of fetus can be done after 9 weeks of gestation to give you the most definitive answer. Hopefully it will be of help. Take care