Interesting factoid: if I beat a pregnant woman, and she miscarries, in nearly all of the states I can think of, there’s some version of a homicide charge that I’d get hit with. Roe v. Wade has more to do with political correctness, etc., than it has to do with the physical act of killing a fetus.
The 2nd Amendment pre-dates Roe v. Wade by a lot, and I assure you that the people who drafted the 2nd Amendment would not have approved of Roe v. Wade. You have to look at the political climate in which that decision was made. The founding fathers would probably just as soon take the abortion practitioner out to ye olde towne square, find a suitable tree, get some rope, and hoist the practitioner from a convenient limb.