All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
Dear Brother, what you have mentioned in your question does not impact upon the permission of using contraceptives in case of necessity as we have mentioned in our previous answer. As you know, some of these contraceptives kill spermatozoons, which may become babies in future if they were left growing.
Here, we are to distinguish between two cases:
1 - Preventing pregnancy before its occurrence.
2 - Abortion after an embryo comes into existence.
The first one is an expectaction of pregnancy. This, in fact, does not constitute a particular object, which necessitate a rule.
Thus the person, who makes an intercourse interruption, is actually killing the spermatozoon, which may become a baby in future. In spite of this the Prophet Muhammad has approved it but he has forbidden abortion, as we have made it clear in our previous answer.
Allah knows best.