Period cramps happen because your body releases hormone-like substances called prostaglandins, which induce muscle contractions.

Medically reviewed by Cordelia Nwankwo, MD Key Takeaways Breast development usually starts about two years before the first ...

"Have you recently given birth to a child, and your periods have not returned yet? If you are also confused about how long after delivery your periods should come and why there is a delay, then this ...