I'm Christian, but I see no biblical argument against abortion. I'm not a fan of abortion, mind you; I think any abortion is a tragedy on some level, and unwanted pregnancies are better prevented than aborted, but sometimes medical complications simply make abortion necessary. And I'd rather leave the hard decisions in the hands of the people affected by them than having legislators force those decisions on them.
I think you would be hard pressed to find anyone who doesn't agree with this statement. The narrative that abortion is used as a form of contraception is largely a false one, but accidents do happen. Most of the women who get abortions already have a child, surprisingly. [1] EDIT -> well, I was surprised, I guess I should say
[1] https://www.nytimes.com/interactive/2021/12/14/upshot/who-ge...
You'd think, and yet there are pro-lifers who oppose abortion and yet also want to make contraception less accessible.
Not everybody has a rational or even logically consistent position in this.
Their pro-life stance would hold A LOT more weight if they were out protesting wars and military spending, not to mention foreign occupation through military means and trying to have that money spent on humanitarian programs. I give credit to the Amish for at least being consistent (and no, I'm not religious).
[1] https://www.christianbiblereference.org/faq_war.htm