1, the ancient Egyptians scraped off the thorns of the cinchona tree and ground it into powder, which was the earliest oral contraceptive;
2. The ancient Romans used contraceptives such as incense tar and lead-containing ointment. This kind of thing doesn't work well, and lead often causes men to be completely infertile (which is considered to be a major reason for the weakness of the Roman Empire);
3. Later, there was TT. At first, it was troublesome to use flax, swim bladder, sheep intestines and even waste paper (it often took a lot of time to find the one that suits your size), and most of them were expensive.
During the industrial revolution, the development of chemistry made contraceptive solvents popular-however, not many people really benefited.
With the development of medicine, people realize the existence of egg cells. So ligation and hysterectomy were put on the agenda.
Finally, Du was born. In fact, TT was first used mainly to prevent sexually transmitted diseases. After all, the population at that time was not 65.438+0 billion, and the earth was not so crowded.