1, the use of "condoms"
The use of animal intestines, some say that the sheep, and said that the pig's bladder is the early "condom". But according to historical records, the Western medieval court used "condoms" is the animal's intestines, there is a very nice name - "Holland bonnet". The ancient Chinese also used fish fat as a "condom".
2, take the method of drinking mercury
Mercury can indeed be contraceptive. So, in the past, prostitutes drank tea or daily food was put into a small amount of mercury. Of course, the prostitutes were kept in the dark and thought it was incense burner ash that could be used as a contraceptive.
Expanded:
1, safe-period contraception
Safe-period contraception is a method of contraception that stops sex during ovulation. The key to using safe period contraception is to determine the date of a woman's ovulation.
Menstruation can change with the body's health, environmental changes and emotional fluctuations, so the ovulation date deduced from the menstrual cycle is not accurate enough, so the failure rate of contraception is very high, usually this method is only applicable to normal menstrual cycle, couples living together for a long time and can correctly grasp the deduction of the safe period of people to use.
2, condom contraception
Condoms, also known as condoms, its safety is reflected in two aspects, on the one hand, compared with the safe period contraceptive method, contraceptive success rate is high, if the use of the correct, its contraceptive rate can reach more than 95%.
Compared with oral contraceptive pills and other methods, the use of condoms has almost no side effects. In addition to contraception, it can also prevent sexually transmitted diseases such as trichomoniasis, mycosis vaginalis, bacterial vaginitis, genital herpes viruses, condyloma acuminatum, syphilis, and AIDS.
3, oral contraceptives
The main component of oral contraceptives is synthetic compound estrogen and progesterone. According to the duration of the contraceptive effect is divided into long-acting, short-acting and fast-acting (family visit) three kinds. Currently the most commonly used is the compound short-acting oral contraceptive pill.
People's Daily Online-Uncovering the contraceptive methods of ancient women in the greenhouse pig bladder as "condom"
Baidu Encyclopedia-contraceptive