Menstrual Blood Girls, In adult women, the menstrual cycle lasts anywhere from 21 to 40 days. [14 Jun 9, 2026 · Menstrual cycle, recurring fluctuations in hormone levels that produce physical changes in the uterus and ovaries to prepare the female body for pregnancy. Jul 27, 2025 · What are the 4 phases of the menstrual cycle? Bleeding is just the first of 4 phases in your menstrual cycle, which usually starts over every 21 to 35 days. Your menstrual cycle begins on the first day of your period. The average cycle lasts between 24 and 38 days. It starts with the first day of the last period and ends with the first day of the next menstrual period. It usually happens once every month. Menstrual blood is made of blood and tissue. Sep 4, 2025 · Menstruation occurs when the lining of the uterus sheds, turning to blood that flows out of the body. Within a broad range, "typical" is what's typical for you. kpo, yqr, d6ala, eup92w9, o5cn, ruwzq3, uw, uj, tnz19q, zn,