(Possible trigger warning for miscarriages/stillbirth. I do not mean any disrespect or harm to any reader.)
It's true. God has a plan for all fetuses.
But not every plan includes being born.
Some fetuses are meant to be born, raised by loving and almost perfect parents, become doctors or scientists, find cures for diseases and save lives.
Other fetuses are meant to be miscarried, or born still. They are mourned or not mourned, always remembered or intentionally forgotten.
Why? We don't know why. God's plan is bigger than all of us, bigger than we can see. We don't know why God runs the world the way He does.
Abortion (the intentional termination of a pregnancy, not necessarily the current day procedure) is obviously a part of God's plan. There are cases in the Bible of God's chosen people killing pregnant women and their fetuses (Numbers 31:15-17, Genesis 38:24) and God's priests causing an abortion if a woman is pregnant after cheating (Numbers 5:11-31). If you can't believe that, one must at least recognize that miscarriage (spontaneous abortion) is a part of God's plan. God controls nature- he designed it, and us- and if He never planned on miscarriages happening, they wouldn't happen.
When antichoicers say "God has a plan for your [fetus]!" they're trying to trick women. Trick women into thinking that God always plans for a fetus to be born. Or that God plans for their specific fetus to be born, and the woman is going to mess up that plan. But God is smarter than that! He knows us; He knows what choices we will make in this life. God's plans coincide with the choices we will make. God would not put, say, the future curer of cancer inside a woman who plans to abort if she ever gets pregnant.
So don't think that you can't make your own choice because 'God has a plan.' God's plans work with you, not against you. Whether you abort or carry to term, God walking the path with you.
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9 months ago