Aaron
Your posting style has me confused. You state things like “If you are using barrier methods or spermicidal methods to avoid pregnancy for legitimate medical needs, then you are not doing anything to kill off that which the Lord is creating… barrier methods can be legitimately used until a surgical sterilization or hysterectomy can be performed” but then when countered on that you state to me “But ‘inadvertent’ killing of the unborn is [moral]?” When further countered on it from others, you state “I couldn’t agree with you more…” This seems in direct opposition to what you were posting earlier.
aaronlgates:
Killing is wrong, especially when the ‘treatment’ causing the ‘inadvertent killing’ is out of proportion to the end as Aquinas observes in the principle of double effect.
Very, very open to interpretation. Keep in mind that it is not considered abortion to use medical BCP, as abortion is defined as “willed”. I’m surprised to see you accept your interpretation of Aquinas’ statement, but not accept the blunt statements of priests and apologists that I have given. But again, I am heartened that you are in conversation with those apologists.
So let’s kill two birds with one stone. I’ve twice asked you to answer the question of whether the woman taking thalidomide for sleep, pregnant or not, is in sin if she is aware of the teratogenicity of the drug and ends up having a baby with no limbs.
And how many times did I have to ask you to look into double effect before you finally responded?

Your question, at minimum, should IMHO only be looked into after baselines have already been established, such as talking more about double effect. Besides, you are asking me a very subjective question here. The OP asked for the Catholic stance on using BCP for a medical condition.
Here is another thread which discusses that couples may have sex while on BCP for medical reasons. Matt makes a fantastic post there. Perhaps his post is the best answer to your thalidomide question.
forums.catholic-questions.org/showthread.php?t=157407
I have offered the evidence I have of the Church’s teachings. You have not responded to a large portion of my posts and you desire to look into the more off topic analogy Thalidomide. Therefore, I think it best to move this post to the Moral Theology section, where it will get far more views from parties looking specifically for this type of post, and with more responses will likely garner a more understandable finale.
Here is the link, please make all future posts in the new thread. I will not respond further in this thread so that the new thread can get the posts and attention it needs. The more heads, the better!
forums.catholic-questions.org/showthread.php?t=215358