I’m not talking about the common law. Due to medical advances in the 1800s, abortion was illegal at all stages of pregnancy in the US by 1910.

Also, “life begins at conception,” or at another very early stage, isn’t a Christian innovation. That’s the belief in Shia Islam. Certain Sunni schools also prohibit abortion at any stage. In Thailand, a Buddhist country, abortion was illegal at all stages of pregnancy until 2021.

Same thing in Hinduism: https://indiacurrents.com/a-hindu-view-on-abortion/

Prohibitions against abortion, even at early stages, are common across the world’s belief systems. Perhaps the only thing you could call uncommon is the view that abortion is impermissible even to save the life of the mother. But that’s an uncommon view even within evangelical Christianity.