A member asked:

If lmp started 10/12 is 10/18 cd6 or cd7?

A doctor has provided 1 answer

Day 7: The first day of bleeding is the first day of the menstrual cycle, so 10/12 is the first day and 10/18 is the seventh day.

Answered 12/10/2013

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Can conception occur as late as 18 days after lmp?

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