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Dr. D. Love
Dr. D. Love, Doctor
Category: OB GYN
Satisfied Customers: 18671
Experience:  Family Physician for 10 years; Hospital Medical Director for 10 years.
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I had an US done on 1/12/16 stating GA of 7wk3 days. My lmp

Customer Question

I had an US done on 1/12/16 stating GA of 7wk3 days. My lmp was nov 16. I had unprotected sex on nov 30 and am pretty sure I ovulated that day. This would make me 8 wks gestation not 7 and 3, according to lmp. I am worried about the potential of another partner on December 5 being the father. Hoping to get this sorted out
Submitted: 1 year ago.
Category: OB GYN
Expert:  Dr. D. Love replied 1 year ago.

What is it that makes you pretty sure that you ovulated on 11/30

Customer: replied 1 year ago.
I usually have ovulation pain every month. a sharp twinging pain located on one side. Sorry correction I had this pain on 12/1 the day after intercourse. And usually I ovulate mid cycle
Expert:  Dr. D. Love replied 1 year ago.

Since you had typical symptoms of ovulation on 12/1/15, which is consistent with the LMP, it is very possible that that the ultrasound is off by a several days. The accuracy of a first trimester ultrasound is +/- about 8%, which would include the time frame that includes ovulation on 12/1.

However, neither symptoms, Lcx, or a first trimester ultrasound are able to accurately differentiate between two potential fathers with whom you engaged in intercourse 6 days apart, so it is impossible to state with certainty who is the father based solely on this information. There is more support for the fatherhood of the partner of 11/30, but it cannot be stated with certainty.

If I can provide any additional information, please let me know.