Killing to defend your life and prevent severe bodily harm is not murder.

Exactly. That's why abortion should be 100% legal. You are more likely to die in childbirth than you are during a home invasion, but you're legally allowed to shoot someone forcefully entering your home (at least where I live).

Having your genitals or abdomen ripped open is severe bodily harm. 1 in 100 mothers will have a story for you about how they almost died. How they coded. How they hemorrhaged. How they had kidney/liver failure. How they had a heart attack. Statistically, 1 in 100 women almost die giving birth. 1 in 3,500 do die. If a man who has a 1 in 100,000 chance (actual statistic) of dying in a home invasion can kill someone, so can a woman who has a 1 in 3,500 chance.