Growing numbers of women and men who are HIV infected and aware of their serostatus, want to have children. Gynecologists are involved in the dilemmas of counseling those couples about reproductive decisions. For HIV infected women, pregnancy is contra-indicated, mostly because of the risk of transmission to the fetus/infant. However, no rational argument can abolish the desire of many young women to have children in the face of the life-threatening infection. The clinical and immune status of the would-be mothers, her partner's serostatus and the availability of family members to rear an orphaned child, must be considered. For seronegative women with HIV-infected partners, after confirming that seroconversion is not occurring, the partner's clinical and immune status must be evaluated. The risk of transmission through unprotected intercourse increases with the degree of immune suppression in the partner. The couple's stability and the woman's motivations for becoming pregnant must also be carefully evaluated. About one third of such discordant couples separate after the birth of their child. For selected couples who have clearly decided to attempt pregnancy, the objective of reproductive counseling is to reduce their risk of heterosexual transmission. The partner's sperm should not be used for insemination because techniques have not yet been established to eliminate HIV from sperm preparations. Insemination with HIV-negative donors' sperm can be considered. An alternative is the "natural" method, consisting in having unprotected intercourse only during ovulation. Administration of zidovudine to the man in order to reduce the amount of virus excreted has been discussed.(ABSTRACT TRUNCATED AT 250 WORDS)