When is the safety period for women?

Women usually only excrete one egg in a menstrual cycle. After ovulation, the fertility (that is, survival) of the egg is only 24-48 hours at most (waiting for fertilization in the fallopian tube), while the life span of sperm in the female reproductive tract is about 2-3 days, so it is possible to get pregnant 2-3 days before ovulation and 1-2 days after ovulation. This period is also called easy pregnancy.

Ovarian ovulation is generally within 2 days before and after menstruation 14 days (specifically, ovulation period is calculated according to menstrual cycle), and ovulation day is generally in the middle of two menstrual cycles. It is impossible to conceive without ovulation. When ovulating, contact with sperm can fertilize.

The safe period is about 10 day after menstruation, from the 20th day after menstruation to the next menstruation. The closer to menstruation, the greater the possibility of contraception.

In fact, many scholars, including Gopula, exclude menstrual period from the safe period, because sexual intercourse is impossible during menstrual period.

The safety period is divided into pre-ovulation safety period and post-ovulation safety period. The period from the day when menstruation is clean to the day before ovulation is the safe period before ovulation. The safe period after ovulation is from the first day after ovulation to the day before the next menstrual cramp. The safe period after ovulation is safer than that before ovulation. This is because some women are sometimes affected by environmental changes and emotional fluctuations and ovulate in advance, so that the safety period before ovulation will be shortened without knowing it, so that the safety period before ovulation is unsafe. It is very rare for the ovary to ovulate twice in a menstrual cycle, that is, the second ovulation will not occur from ovulation to the next menstrual cramp, so the safe period after ovulation is safer.