Gov. Kay Ivey of Alabama signed legislation on Friday that prevents medical professionals from providing care that aids transgender young people in transitioning, adopting some of the country’s most restrictive measures and threatening doctors and nurses with up to 10 years in prison.
Ms. Ivey, a Republican, also approved legislation that requires students to use restrooms and locker rooms for the sex listed on their original birth certificates.
It also limits classroom discussions on gender and sexual orientation — a version of what critics call a “Don’t Say Gay” measure that goes further than some other states.
The legislation is part of a flurry of bills introduced across the country as conservative lawmakers have focused their attention on transgender people and other L.G.B.T.Q.