A leading Republican state legislator in Idaho suggested last week that he would be open to holding hearings on banning emergency birth control, and Sen. Marsha Blackburn, R-Tenn., recently denounced Griswold v. Connecticut, the 1965 case that expanded access to contraception to unmarried people.

In Louisiana, legislation would classify abortion as a homicide and define “personhood” as beginning from the moment of fertilization. Contraception methods like Plan B and certain types of intrauterine devices, or IUDs, could be restricted under the bill, said Cathren Cohen, a scholar of law and policy at the UCLA Law Center.

“Anything that would prevent a fertilized egg from turning into a pregnancy and being born into a baby could be considered a homicide,” she said. “If you define a pregnancy and you define a person as including just this fertilized egg, then technically you are legislating that an IUD can cause an abortion.”