Would abortion still be considered wrong/bad if it’s medically necessary to save the life of the mother? What if the child was a consequence of sexuality immorality such as rape/incest? How should a Christian proceed in those scenarios?
The Bible teaches that a person living inside the womb of a mother is no less a person, no less alive and no less under God's protection than a person living outside the womb:
Therefore, since the Lord values the life of a person inside the womb equally with the life of a person outside the womb, we must apply the same rules for life to both groups. The rules for taking the life of a person inside the womb should be no different than the rules for taking a life outside the womb.
So we should ask, does the Bible allow us to take the life of a person in order to save the life of another person? No. Does the Bible allow us to take a person's life because their existence is undesirable to another person? No. The only reasons given in Scripture for taking a person's life is in response to a capital crime (e.g., murder, etc.), and this rule must be applied equally for all people whether living inside a womb or outside a womb. Since a person inside a womb could never commit a capital crime, then there is never a biblical reason to take that life under any circumstances.