Answer:
Step-by-step explanation:
At the end of the menstrual cycle and the start of menstruation, the uterine lining sheds in a process known as menstruation or a menstrual period. Menstruation is a natural part of the female reproductive system and occurs approximately every 28 days in most women.
Here's a brief overview of what happens during this transition:
1. **Menstrual Cycle Completion:** The menstrual cycle is divided into different phases, including the menstrual phase, follicular phase, ovulation, and luteal phase. The menstrual phase occurs at the end of the cycle.
2. **Shedding of the Uterine Lining:** During menstruation, the body sheds the thickened uterine lining (endometrium) that had built up in preparation for a potential pregnancy. If pregnancy does not occur, this tissue is no longer needed and is expelled from the body.
3. **Menstrual Blood Flow:** Menstrual blood, which consists of blood, tissue, and uterine lining, exits the body through the cervix and the vaginal opening. This process typically lasts for several days, although the duration can vary among individuals.
4. **Menstrual Symptoms:** Many women experience symptoms like cramps, bloating, breast tenderness, and mood changes during this time.
5. **Cycle Reset:** After menstruation, the body begins the cycle anew with the development of a new egg (ovum) and the thickening of the uterine lining, preparing for another potential pregnancy.
Menstruation is a normal physiological process in the female reproductive system and is necessary for fertility. However, the experience of menstruation can vary from person to person, and some individuals may encounter discomfort or challenges related to their menstrual cycles.