PIP: Until recently, some behaviors were viewed as entailing a high risk of HIV infection, but HIV is now considered a great risk for the female population in general. The number of HIV infected women is increasing rapidly even in areas such as Mexico and South America where women form a minority of AIDS patients. Most women infected with HIV and other sexually transmitted diseases (STDs) are sexually active and at risk of pregnancy. Some STDs, notably those producing genital ulcers, increase the risk of HIV infection. It is not yet known whether STDs not producing ulcers also increase the risk. There is controversy over the extent to which specific contraceptive methods increase or perhaps reduce the risk of HIV infection. Some unconfirmed assumptions are that the cervical ectopy produced by oral contraceptives (OCs) results in affected zones more vulnerable to trauma and thus perhaps to HIV infection, and that combined OCs by reducing menstrual bleeding also reduce risk of infection. OCs containing only progestins may increase the risk of transmission by inducing irregular bleeding, thickening the cervical mucus, and thinning the vaginal epithelium. Injectables may increase risk by increasing bleeding, thinning the vaginal epithelium, or through use of contaminated needles in application. IUDs may increase menstrual bleeding and are not advisable in any event for women at high risk of other STDS. Condoms and spermicides offer some protection against STDs, but are not highly effective contraceptives. The interrelations between risk of pregnancy and of disease are a great and largely unresolved problem in women's reproductive health. Few family planning services are able to address prevention of STDs and especially AIDS adequately. Methodological and logistical problems impede study of the interrelations between contraception and STDs, and resources are limited. Studies of commercial sex workers in different countries have offered a partial solution. Women's lack of power to negotiate successfully concerning sexual relations and their lack of access to a means of preventing STDs under their own control are factors in their vulnerability. Improved reproductive health of women will require development of new products to control disease, structural changes in health services, and continued research.