If anyone is still interested:
I am taking a history of the Church course at my church. It is from Ignatius Press, is twenty weeks long and is entitled Epic. In the first lesson, I learned a little about the Didache, which was written in 400 AD. According to the catechist, part of the Didache addresses and is the first known written law regarding contraception. It was considered for inclusion in the Bible. It was not chosen.
If the first written law re contraception was written in 400 AD, I would think it would beg the question: was anything known about ectopic pregnancies? Probably not. Women probably died of it, as a matter of course. What if they had known about ectopic pregnancies? What would have been said in the Didache? Would it have made ectopic pregnancies an exception?
We know the law. I, myself, think God would allow a barrier type of contraception. That type would not kill a fetus. It would prevent sperm from meeting the egg. I like to think of God as a benevolent, merciful God. Of course, He is a just God, as well.
Bottom line: IMHO, we know the Law. Now, let’s use common sense.