Several unsafe methods of contraception

　　Safe period contraceptive methods: Maybe you're good at math, but don't take any chances with this form of birth control. You know, its success rate is less than 30%. First of all, you must fully understand your ovulation cycle, understand the calculation method of the safe period, and ensure that you have a lot of patience not to have sex outside the safe period, otherwise the "safe period" is just empty talk for you.

　　Incorrect condom use: If you think this little thing is easy to fix, you are wrong. A survey of more than 1,100 men and women conducted by researchers at the University of Alabama at Birmingham showed that nearly a quarter of them had used condoms incorrectly in the past month. These mistakes can easily lead to insufficient lubrication during sex, rupture of the condom, sperm Overflow and other issues, female The chance of unintended pregnancy also increases.

　　In addition, in vitro ejaculation , Cervical mucus secretion measurement method for contraception also has varying degrees of risks. And once you become pregnant unexpectedly, you will repeatedly flow of people will make it even more Uterus The chance of damage increases, which directly affects future fertility. 》》》  ancient times8A strange contraceptive method