A member asked:

I have 32 day cycles, last period was september 14th. had an ultrasound today november 12th and measured 7 weeks 3 days. edd is june 27th. when did i conceive?

A doctor has provided 1 answer

Not knowable, but: The LMP is the first day of bleeding during the last menstrual period. The number of weeks pregnant (weeks gestation) is counted from the LMP date, with the due date estimated to be 40 weeks after the LMP date. Conception is ESTIMATED to be 2 weeks 4 days after the LMP date. From the last period (LMP), the estimated conception date Oct. 2, plus or minus 1 week.

Answered 11/13/2019

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