How long does the menstral cycle last?

The menstrual cycle typically lasts between 21 and 35 days, with an average of 28 days.

It is counted from the first day of menstrual bleeding (the first day of your period) to the day before your next period starts.

The length of the menstrual cycle can vary from woman to woman, and can also vary from cycle to cycle for the same woman.

Here are the different phases of the menstrual cycle:

- Follicular phase: This phase begins on the first day of menstruation and ends when ovulation occurs. During this phase, the levels of the hormone estrogen rise, which stimulates the growth and development of a follicle in the ovary. The follicle contains an egg.

- Ovulatory phase: This phase occurs when the follicle ruptures and releases the egg into the fallopian tube. The egg travels down the fallopian tube towards the uterus.

- Luteal phase: This phase begins after ovulation and ends when menstruation begins. During this phase, the levels of the hormone progesterone rise, which helps to prepare the uterus for implantation of a fertilized egg. If the egg is not fertilized, the levels of progesterone and estrogen drop, which causes the lining of the uterus to shed and menstruation to begin.

The length of each phase of the menstrual cycle can vary from woman to woman. The follicular phase typically lasts for around 10-14 days, the ovulatory phase typically lasts for 1-2 days, and the luteal phase typically lasts for around 14-15 days.