A member asked:

Do you consider the menstruation as the first day if it came at night ?

3 doctors weighed in across 2 answers
Dr. Gloria Lopez answered

Specializes in Pediatrics

Menstruation: The start of the menstrual cycle is defined as the first day of bleeding. This includes the day(s) of brown flow before it takes on a more reddish color. (even if it starts during the night).

Answered 2/4/2013

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Yes: The first day menstruation starts regadless of time, is the 1st day.

Answered 4/8/2015

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