A member asked:

Can donating blood cause a delay in a girl's period?

A doctor has provided 1 answer
Dr. Donald Alves answered

Specializes in Emergency Medicine

It might: It is a physiologic stress to the body (it does not know you "meant to" lose a pint of blood), and this can cause a brief hormone flux that may delay or skip the menstrual cycle for the month. Not abnormal.

Answered 7/22/2020

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