Through fiscal cutbacks and structural changes, Reagan's federalism assaulted the ethos of public health. In assessing the effects of Reagan policies on a basic public health program, family planning services, we find a substantial decrease in spending for this program, a reduction in the numbers of patients served, and increased variation among the states in the provision of services to low-income women. These effects are comparable with findings from other studies on the impact of Reagan's federalism upon social programs and have manifold implications for public health.