Secular Reasoning
Premesis:
1. Murder is considered morally wrong in my culture.
2. One murder is worse than zero murders, and two murders are worse than one.
3. Not attempting to save a life (if you have the capability) is wrong and can be likened to murder.
4. Saving a life is good.
5. If a mother's life is endangered by her pregnancy and an abortion can save her life, then not having an abortion results in 2 murders.
6. If a mother's life is endangered by her pregnancy and an abortion can save her life, then having an abortion results in 1 murder and 1 life saved.
Conclusion
Therefore, if a mother's life is endangered by her pregnancy and an abortion can save her life, then an an abortion is better than the alternative (1 death is better than 2, 1 saved life is good).
Biblical Argument (for Christians)
1. If the bible is divinly inspired, then Hos.9:16, Hos.13:16, Dt.20:16, Jos.10:40, & Ex.12:30 are divinely inspired.
2. The Bible is divinly inspired.
Conclusion:
Therefore, Hos.9:16, Hos.13:16, Dt.20:16, Jos.10:40, & Ex.12:30 are divinely inspired.