Scientists continue to search for better and safer methods of contraception.
Methods For Women
For women, some researchers are looking at implants of long lasting contraceptive substances known as progrestogens. Such implants might last five years, unless they were removed to removed to restore fertility. Other researchers are working on the possibility of a tampon or suppository containing prostaglandins, which could be used to induce the women to menstruate each month.
Another new device is a thimble shaped rubber "cup" that fits snugly around the cervix and requires no spermicide. It can be felt in place continuously until the women wishes to become blood and cervical mucus pass through. The cap is currently being tested, and may be available around 1985.
A more controversial method, currently under debate, is the use of injected substance containing a synthetic hormone that prevents ovulation for at least ninety days. Depo provea has serious side effects, including weight gain, headaches, heavy bleeding, and depreciation; it may even cause a permanent loss of fertility. The FDA has forbidden its distribution in the United States for contraceptive purpose.
Method For Men
Research is also under way on chemical contraceptives for men. There are many substances known to suppress sperm production but also to have unacceptable side effects. For example, gossypol (a cottonseed derivative) has had some success in China, but it has serious side effects, including difficultly in restoring fertility when a user stops taking the drug. Some make chemical contraceptive tend to reduce potency and sexual desire, and some are incompatible with alcohol. Nevertheless, some progress is being made. Various combinations of male and female sex hormones and other compounds are being tested in human volunteers, and a male be on the market within the next ten years.
Other type contraceptive:
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