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The menstrual cycle is the sequence of events that begins with one menstruation and ends with the next. Menstruation occurs every 28/29 days in human females. Menstruation, the follicular phase, ovulation, and the luteal phase are the four phases of the menstrual cycle.

The menstrual cycle is a series of natural changes in hormone production and the structures of the uterus and ovaries of the female reproductive system that makes pregnancy possible. The ovarian cycle controls the production and release of eggs and the cyclic release of estrogen and progesterone.

Starting on the first day of your period, start counting. The day before your next period is the last day of your menstrual cycle. That's when you stop counting. That's how many days you had in your menstrual cycle that month.

Adult period length For an adult who is not using any form of hormonal birth control or IUD, a typical period length is up to 8 days (6). The first two days of the period are usually the heaviest flow, with the latter days having progressively less blood (7).

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 is called ovulation. Hormonal changes at this time get the uterus ready for pregnancy.

In a life cycle, a woman's body is vulnerable to a variety of changes. The cycle of these changes occur in women every month, positively for pregnancy is called the menstrual cycle. When an ovum is unfertilized, the uterus lining sheds and leads to a haemorrhage, called menstruation.

? A menstrual cycle consists of natural changes that occur in a woman's body every month in preparation for pregnancy. Menstruation starts at puberty and ends at menopause. ? The cycle lasts an average of 28 days but may vary between 20 and 40 days.