Sexually transmitted diseases and the risk of tubal pregnancy.

Women who were hospitalized for tubal pregnancy in five hospitals in King County, Washington, between 1975 and 1979 were interviewed regarding a prior history of gonorrhea, genital herpes, genital warts and trichomoniasis. Their responses were compared to those of women who delivered a live-born child during the same period. Multiple logistic regression was used to control for the effects of race, gravidity, smoking, Dalkon Shield use, douching, number of sexual partners and history of additional sexually transmitted diseases. The risk of tubal pregnancy in women who reported a history of gonorrhea, relative to that in other women, was 5.1. As compared to controls, women with tubal pregnancy more often reported a history of genital herpes and a history of trichomoniasis.