The Comstock Act had a tremendous negative impact on sex education, contraception, and abortion accessibility.
The Comstock Act involved a very broad interpretation of what can be considered "obscene." It remained in place until 1957, with local governments keeping their own applications of the law in place for an additional eight years.
More About Comstock Act
The Comstock Act was championed by Anthony Comstock after he blamed the death of a close friend on him having been "led astray and diseased" by obscene materials. After the act was passed, Comstock devoted his life to actively enforcing the law and punishing anyone connected to materials that fit his (broad and vague) definition of obscene.