Regarding the safe period of contraception, is the saying "7 before and 8 after" really reliable?

The first seven and last eight are safe periods, which is not accurate. A woman's ovulation period is closely related to each woman's menstrual cycle. Generally speaking, the ovulation period is 14 days before the next menstrual cycle. The method of calculating the safe period is based on the menstrual cycle, but each woman's menstrual cycle is different. The first seven days and the last eight days are safe days, calculated for women with a menstrual cycle of 28. Not all women have a 28-day menstrual cycle. Some women have menstrual cycles of 25, 35 or even 40 days. Then this method is wrong.

1. Even if menstruation lasts for 28 days, using this method for contraception is unreliable. We know that women’s menstruation is affected by many factors, such as mood swings, diet, weather, etc. If you have been 28 days, but you have been angry this month, or changed your eating habits, then your menstrual cycle this month is likely to become 35 days, or 20 days, etc., then at this time, you Not sure when my period will come. If you still calculate according to the first seven days and the last eight days, the possibility of pregnancy is very high.

2. Women's ovulation is affected by many factors, such as their own emotional and physical health, as well as the external environment. Especially for contemporary women, their work and life pressures are huge, and many of them are in a sub-healthy state. The ovulation period of such women is not easy to determine.

3. The safe period refers to the remaining time except a woman’s menstrual period and ovulation period. The popular algorithm is the first seven days and the last eight days, that is, the first seven days before the first day of menstruation and the last eight days after the end of menstruation. Let's first look at the official safety and contraceptive failure rates. The World Health Organization announces that the contraceptive failure rate during the safe period is about 5%, but in fact, the probability is far greater than this. In fact, it can reach 25%. Compared with the 99% safety rate of condoms, the safety rate of contraception during the safe period is ridiculously low.

At present, condoms are reliable condoms that are very convenient to use, will not affect the pleasure of sexual life, and can also prevent the spread of some sexually transmitted diseases. In addition to condoms, short-acting oral contraceptive pills can also be used. Taking a birth control pill every day can also achieve contraceptive purposes. If a woman is married and has given birth, she can use birth control, which involves having an IUD placed inside her body, regardless of whether she plans to become pregnant in the future. If you are married and have children and do not want to have more children in the future, you can take birth control measures. Men can have a vasectomy and women can have a fallopian tube ligation. It is important to note that male vasectomy is reversible. If you want to get pregnant in the future, you can have recanalization surgery.

However, female fallopian tube ligation is irreversible and should be carefully considered before proceeding