This article examines birth control as practice and discourse in 1920s and 1930s Korea under Japanese colonial rule and explores links with family planning and reproductive practices in post-1945 South Korea. The control of women's reproduction held critical implications for meanings of domesticity, marriage, sexual relations, and new womanhood. While a woman-centered position did emerge regarding birth control, the parameters of the discourse, concerns of gynecology, and the material culture of birth control ultimately tied the bodies and health of women to their biological and social roles as mothers.