Menstrual Cycle

text 213 W : https://www.ncbi.nlm.nih.gov/books/NBK279054/

text 519 w : https://my.clevelandclinic.org/health/articles/10132-menstrual-cycle

video 12'56 : https://youtu.be/h36poEtEbi4?si=YF-2TorW3lqcCmwr What Is The Menstrual Cycle? | Physiology | Biology | FuseSchool Women, usually between the ages of 12 and 50 years old, undergo a monthly cycle in which their uterus prepares for pregnancy; it prepares for a fertilised egg to settle and grow into a baby. If pregnancy does not occur, the lining breaks down and is expelled from the uterus. This is known as menstruation.