['In surveys, almost 50% of women prefer a female endoscopist (FE) to perform their screening colonoscopies (SCOs).', 'To assess whether offering women an FE is associated with higher rates of SCOs.', 'Prospective cohort study.', 'University of Colorado Hospital primary care clinics.', 'Women of ages 50 to 69 years eligible for an SCO.', 'SCO offers through mail and telephone outreach, with and without an explicit FE option.', 'Outreach intervention differences in SCO completion rates and percentages of women requesting FE.', 'Of 396 women, 72 (18.2%) underwent SCO without difference by type of invitation. Women who received an FE invitation were more likely to request an FE than patients who received no invitation (44.2% and 4.8%, respectively, P < .001), but women who requested an FE were not more likely to undergo an SCO than those who did not.'] Are rates of screening colonoscopy increased when women are offered a female endoscopist in a health promotion outreach program?