Is contraception really safe?

The effective rate of safe period contraception alone is only about 70%-80%, so safe period contraception is not reliable. If safe period contraception is used alone, it is a relatively dangerous contraceptive method. Safe period contraception often needs to be combined with condom contraception, in vitro sperm excretion and other methods. The middle of two menstruation is ovulation period. One week before and after ovulation period or five days before and after ovulation period are easy to conceive. Ovary has the possibility of ovulation at any time. It is also called relative risk period. Other times are relatively safe periods, mainly including the first week and the last week of the menstrual cycle. There is basically no ovulation in the ovaries, but there is also the possibility of accidental pregnancy, because sperm can survive for 3-4 days in women, and it has been reported that it can survive for up to one week. If there is ovulation, there is the possibility of pregnancy, so the safe period of the same room should also take contraceptive measures, generally recommended condom tools contraception, can also take in vitro sperm discharge, but contraceptive effect is not as good as condom contraception.