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A member asked:

My ultrasound 6wks out says conception date was january 15. can i rule out the partner from jan 4 as the father?

A doctor has provided 1 answer

No: First trimester US for dates are good but not perfect and every woman has a different cycle. +/- 2 weeks are fair game for conception

Dr Fowler and another doctor agreed

Answered 2/23/2015

3.2k views

Thank

Related Questions

A member asked:

Four first trimester ultrasounds done at 7 8 10 12 week all come. Up with same conception date. What's it mean??

A doctor has provided 1 answer

A member asked:

Do ultrasounds date from conception or lmp? I.E. If they say baby measures 12 weeks, is that from conception or should that date back to your lmp?

A doctor has provided 1 answer

A member asked:

If ultrasounds date from conception, then why did the sonographer tell me i was exactly as far along as my LMP says? Edds were the same as well.

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A member asked:

If ultrasound says i conceived around 10/27, what dates would sex had to have happened for a conception date close to that?

A doctor has provided 1 answer

A member asked:

1st ultrasound says crl 8mm 6w5d. 2nd says crl 28mm, 9w4d. 3rd , crl 60.9mm 12w4d.Are these supposed to date back to lmp? When was conception?

A doctor has provided 1 answer

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