A member asked:

Should the baby's crown to rump measurement in early pregnancy date back to your period or to conception? if baby was 7mm, 6w5d, when was conception?

A doctor has provided 1 answer

Dr. Gerard Honore answered

Specializes in Fertility Medicine

LMP, either: Crl 'can' be dated to either menstrual period or conception, but for medical obstetrical purposes it's always dated to the lmp. It's still only a guess.

Dr Fowler agreed

Answered 11/8/2013

4.8k views

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A member asked:

Should the baby's crown to rump measurement in early pregnancy date back to your period or to conception? if baby was 7mm, 6w5d, when was conception?

A doctor has provided 1 answer

Dr. Gerard Honore answered

Dr Fowler agreed

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