What took so long? If you think about the history and the talking points of the anti-abortion and anti-contraception movements, this outcome is guaranteed when letting them gain power.
If you believe that a new human, with all associated rights and freedoms, is created at the moment of conception, then this outcome is obvious.
The only way it could have gone any differently would be to declare that conception can only occur as a result of actual sexual intercourse. And that leads to the conclusion that these embryos are not and can never be human.