People’s demand for preventive medical care is one type of investment in health. The aim of this paper is to examine women’s demand for secondary prevention in Taiwan, focusing on the role a physician’s gender plays in women’s inclination to undergo Pap tests. Our estimation results show that regional ratio of female doctors has a positive and significant effect on utilization of Pap tests for the full sample and for women aged below 30. In addition, doctor’s gender matters only in utilization of Pap tests not in other types of preventive healthcare services in Taiwan. We suggest that the government may consider liberalizing medical laws to make it legal for trained female nurses or nurse practitioners to perform Pap tests in order to encourage the utilization of Pap tests, especially in rural and mountain areas. The government may also consider subsidizing the use of cervical cancer vaccines to help females prevent cervical cancer.