Social issues played a part in the campaign. Walker has stated that he is "100% pro-life" and that he believes life should be protected from conception to natural death. He opposes abortion, including in cases of rape and incest. He supports abstinence-only sex education in the public schools and opposes state supported clinical services that provide birth control and testing and treatment of sexually transmitted diseases to teens under age 18 without parental consent. He supports the right of pharmacists to refuse to fill prescriptions for contraceptives on religious or moral grounds. He supports adult stem cell research but opposes human embryonic stem cell research.