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A member asked:

Guy 1 was 1/25/13 and guy 2 was 2/1/13 , my test was positive 2/16/13 , my due date was 10/25/13 , would guy 1 or guy 2 be my sons father? lmp 1/18/13

A doctor has provided 1 answer

Not possible to tell: If your menses was 1/18, you would be ovulating around 2/1, just the time of guy 2. It takes one week for a blood test to become positive. So by 2/16 it would be positive. But is is also possible that the sperm from guy one is still there on 2/1. So you can't know for sure.

Answered 2/4/2014

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