What is the ruling on a man having intercourse with his wife without ejaculating semen into her vagina if she is prevented from pregnancy and dislikes taking medication, and what is the ruling if she is not prevented from pregnancy?

Al-'azl (coitus interruptus) is the withdrawal of the penis from the vagina before ejaculation. It is disliked (makrooh) unless there is a valid excuse, and it becomes permissible with the wife's permission. Evidence for its being disliked includes that it reduces progeny and deprives the wife of pleasure, and the Prophet, peace and blessings be upon him, encouraged a large progeny.

The excuses that permit 'azl are: fear of the child becoming an unbeliever if the wife is in a land of war, or fear of slavery if she is a slave woman, or if pregnancy would sicken the wife or increase her illness, or fear of weakening the nursing infant, or fear of the corruption of offspring due to the corruption of the times.

If the wife is prevented from conceiving, 'azl is permissible without being disliked, provided she gives her permission; otherwise, it is disliked.