Endometriosis pain doesn’t arrive gently. Sometimes it comes like a wave—sudden, violent, and impossible to escape. It pulls you under, releases you just long enough to breathe, and then crashes over you again. This is what many Endo warriors live through every month, in a cycle that breaks more than just the body.

The menstrual cycle is more than a period — it’s a monthly rhythm guided by hormones that affect energy, mood, pain, and inflammation. This guide explains the four cycle phases and key hormones like estrogen, progesterone, FSH, and LH to help better understand your body.