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Can someone answer these questions about pregnancy for me please? - questions about pregnancy more condition_symptoms cramps

I really do not know a lot of knowledge about pregnancy and everything, and I had a few questions.
Can you get pregnant if the sperm of a man is exposed .. Anal, if that makes sense?
Furthermore, if the abortion is true that if you become pregnant after an abortion is not a problem with the baby? or if you can make more than one abortion, and trying to get pregnant is more difficult to get pregnant and stay pregnant when the child has some sort of problem?