Women frequently request a female OB/GYN. The number of male OB/GYNs has steadily decreased since the 1980s. Today, 59% of practicing OB/GYNs are women, and in the 2017 Match, 82% of those who matched into OB/GYN were women.
But by the same token, men frequently request a male urologist. (Urologists treat male sexual and reproductive issues, as well as bladder and kidney issues in both sexes.) There are few female urologists, with only about 8% of all currently practicing urologists being female.
BTW, despite there being more women than men in OB/GYN, the most competitive and highest paying OB/GYN subspecialties (gyn onc, uro-gyn, REI, pelvic surgery) are disportionately male.