How to calculate a girl's ovulation period?

A woman's menstrual cycle usually lasts 28 days, but it varies from person to person. Generally speaking, women's menstrual cycles are divided into three types: menstrual cycle (28-30 days), long cycle (40-50 days) and short cycle (28 days).

The female menstrual cycle is controlled by the thalamic-pituitary-ovarian axis (hormonal axis). This axis includes three important organs: the thalamus, pituitary gland, and ovaries. The thalamus controls a woman's cycle, the pituitary gland controls a woman's hormone levels, and the ovaries control the formation and release of a woman's eggs.

A woman's menstrual cycle can be divided into three phases:

1. Prodromal phase: This is the first phase of the female cycle, usually occurring between days 11-14 of the menstrual cycle. During this stage, a woman’s hormone levels increase in preparation for pregnancy.

2. Phase: During this phase, women’s hormone levels reach their highest levels, usually occurring between days 15-19 of the menstrual cycle. During this stage, the egg cell is mature and ready to be released.

3. Phase: During this phase, women’s hormone levels begin to decrease, and this is the stage when the egg cells are preparing to be released. During this stage, a woman's body temperature will rise, which is the stage of preparation for pregnancy.

A woman's menstrual cycle is 28 days long, but some people have 29 or 30 days. If your cycle is not 28 days, you can talk to your doctor to see if any adjustments are needed.

If you're unsure about your menstrual cycle, talk to your doctor or professional health care provider. They can help you learn how to calculate your ovulation and develop an appropriate fertility plan.