Obstetricians and gynecologists screen women for STDs at a higher rate than other specialties represented in this study. Consistent with published guidelines, most obstetricians and gynecologists in our survey screened pregnant women for chlamydia, gonorrhea, and syphilis. Nonetheless, only about half of obstetricians and gynecologists screened nonpregnant women for gonorrhea or chlamydia, and fewer screen nonpregnant women for syphilis.