How long does it take for girls to menstruate and ovulate?

Generally, a woman's menstrual cycle is 28 days long, but some women may have it a few days later or earlier. When a woman starts menstruation, her ovulation period takes about 14 days. At this time, the woman's eggs will mature and be released in the ovaries, ready to enter the fallopian tubes and combine with sperm. Therefore, if a woman's menstrual cycle is 28 days, her ovulation period will usually be on day 14.

However, the length and regularity of a woman's menstrual cycle may be affected by many factors, such as genetics, age, hormonal levels, etc. Therefore, for different women, her ovulation period may be different.

In addition to menstruation and ovulation, there are other factors that can affect a woman's fertility. For example, if a woman suffers from family planning problems, such as family planning surgery, IUD, or medical abortion, these measures may affect the woman's fertility. Additionally, if women have other diseases or health conditions, it may affect their ability to have children.