How Accurate Is The Date Of Conception Calculation Based On An Ultrasound?

Posted on Sat, 8 Aug 2020

Medically reviewed by Ask A Doctor - 24x7 Medical Review Team

Sat, 8 Aug 2020 Answered on

Fri, 1 Aug 2025 Last reviewed on

Question : How accurate is the date of conception calculation based on an Ultrasound? I had sex with a girl on XXXXXXX 13th, and she had sex with her ex-boyfriend on XXXXXXX 7th. The doctor told that she is 10 weeks pregnant and the date of conception was on XXXXXXX 6th. Is it still possible it could be my child?

Answered by Dr. Richa Agarwal (24 hours later)

Brief Answer:
Yes,in early pregnancy it is very accurate.

Detailed Answer:
Hello dear,
Thanks for the information.
In early weeks of pregnancy, ultrasound is very accurate in diagnosing exact weeks of pregnancy and margin of error only 2-3 days.
For confirm paternity you can go for paternity test as well.
It can be done in your case,so it will confirm who is the father of the child.
Hope found useful.
Good luck
Regards

Above answer was peer-reviewed by : Dr. Raju A.T