Someone asked us:
Hi, I was wondering if having sex can push one’s period back?
Unprotected vaginal intercourse can push back your period.,- by about nine months! :-) But I don’t think you were talking about pregnancy when you asked your question.
Hormones, not sexual activity, are responsible for starting and stopping your period. FSH and LH, which are hormones released by the pituitary gland in your brain, trigger the production of estrogen in your ovaries,which results in the release of an egg. After ovulation, the ovaries produce progestin, which turns off the FSH and LH and eventually causes the lining of the uterus to shed (hello period!). If it sounds complicated, that’s because it is! But this neat little interactive animation can help you understand what’s going on.
Stress, low body weight, and some kinds of birth control can interrupt or even temporarily eliminate your period, but it’s unlikely that having sex has any impact on the hormones that regulate your cycle.
-Nathan at Planned Parenthood