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How To Calculate The Date Of Conception Using Gestational Age?

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Posted on Mon, 22 Jun 2015
Question: I am currently 18 weeks and four days pregnant. My due was calculated using an ultrasound an I could not remember the exact date. Per the ultrasound my lmp was 1/19/15. I do recall having some bleeding on 2/8/15. I had sex with partner one on XXXXXXX 30, Feb 1 and 2. Another on 2/7. What are the odds of the second man being the father. Also I had an amnio done on May 20. Would it be possible to determine paternity after the fact?
doctor
Answered by Dr. Shoaib Khan (44 minutes later)
Brief Answer:
First man holds more chances of being the father, than the second

Detailed Answer:
Hello ma'am and welcome.

Thank you for writing to us.

I have gone through your query with diligence and would like you to know that I am here to help.

1. As your gestational age, conception would have taken place on the 30th of January

2. As per the bleeding you had, which could possibly have been an implantation bleed the conception does point towards the second man which took place on 2/7

But in such cases, the more likely date of conception is from the first man and not the second. So the chances of the first man being the father are about 60 %, and the second man holds only a 40% chance. I am guessing you are hoping the father is the second man?

Yes, it is always possible to determine paternity using a DNA test once the child is born. I hope you find my response helpful. Please feel free to write back to me for any further clarifications, I am always here to help.

Best wishes.
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
doctor
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Follow up: Dr. Shoaib Khan (4 minutes later)
Can the results from the amniocentesis be used to determine paternity? Hoping for the first guy to be the father. Thank you for your time.
doctor
Answered by Dr. Shoaib Khan (8 minutes later)
Brief Answer:
Yes it can be used for paternity testing ma'am

Detailed Answer:
Hello once again ma'am.

Yes, amniotic fluid can be used to provide DNA to go about a paternity test. I am also guessing the first guy is the father, and I hope this is the case. :)

Wishing you lots of luck for the test.
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
doctor
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Follow up: Dr. Shoaib Khan (2 minutes later)
Thank you, enjoy your weekend.
doctor
Answered by Dr. Shoaib Khan (5 minutes later)
Brief Answer:
Thank you and wishing you the same

Detailed Answer:
Wishing you the same.

Cheers.
Note: For further follow up on related General & Family Physician Click here.

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Answered by
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Dr. Shoaib Khan

General & Family Physician

Practicing since :2009

Answered : 9409 Questions

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How To Calculate The Date Of Conception Using Gestational Age?

Brief Answer: First man holds more chances of being the father, than the second Detailed Answer: Hello ma'am and welcome. Thank you for writing to us. I have gone through your query with diligence and would like you to know that I am here to help. 1. As your gestational age, conception would have taken place on the 30th of January 2. As per the bleeding you had, which could possibly have been an implantation bleed the conception does point towards the second man which took place on 2/7 But in such cases, the more likely date of conception is from the first man and not the second. So the chances of the first man being the father are about 60 %, and the second man holds only a 40% chance. I am guessing you are hoping the father is the second man? Yes, it is always possible to determine paternity using a DNA test once the child is born. I hope you find my response helpful. Please feel free to write back to me for any further clarifications, I am always here to help. Best wishes.