The menses phase: This phase begins on the first day of your period. It's when the lining of your uterus sheds through your vagina if pregnancy hasn’t occurred. Most people bleed for three to five days, but …

Menstruation is the most visible phase of the menstrual cycle and its beginning is used as the marker between cycles. The first day of menstrual bleeding is the date used for the last menstrual period …

Aug 17, 2018 · During your period, you release a combination of blood, mucus, and tissue from your uterus. You may have period symptoms like these: The follicular phase starts on the first day of your...

Jan 16, 2026 · menstrual cycle, recurring fluctuations in hormone levels that produce physical changes in the uterus and ovaries to prepare the female body for pregnancy. In adult women, the menstrual …

Apr 22, 2023 · What's the menstrual cycle? The menstrual cycle is the monthly series of changes the body goes through to prepare for pregnancy. Each month, one of the ovaries releases an egg. This …

Jan 13, 2025 · Throughout a monthly menstrual cycle, your body makes different amounts of chemicals called hormones to prepare for pregnancy. These changing hormone levels can cause menstrual …

Jan 11, 2026 · Menstruation, or period, is normal vaginal bleeding that occurs as part of a woman's monthly cycle. Every month, your body prepares for pregnancy. If no pregnancy occurs, the uterus, …

Sep 4, 2025 · Menstruation (period blooding) is when the uterus lining sheds and leaves the body as blood, typically lasting three to seven days each month. You can manage menstrual pain and …

A menstrual cycle is defined as the first day of menstrual bleeding of one cycle to the first day of menstrual bleeding of the next cycle.

The female reproductive system is complex. Learn about how your reproductive system works to maintain a regular menstrual cycle.