@ Alex, you won't have an answer that will sufficiently quench your thirst in the pursiut of truth especially in the issues of LIFE (where the Author of Life is God Himself), WHY? well, because these folks here without admitting (self-denial) - that they lack any organic Apostolic authority to pass, declare and promulgate and make a binding teaching. (viz. artificial contraceptio, gay-marriage, abortion etc)
For Pete's sake they don't even agree with their "founding fathers" so why do we take their word seriously? (Jae, Contra Liccione on the Canon Question, 4:14 PM, August 18, 2010)
As Jae's criticisms remind us, it's a popular strategy for Catholics to assert that Protestants have neither an authoritative nor unified stance on controversial bioethical issues. Whatever problems are to be identified in Jae's approach (and there are several), modern bioethical issues are challenging to navigate. However, this is far from saying that Scripture doesn't provide clear direction on these matters. For lay Protestants interested in working through these issues, I'd like to recommend two books:
Bioethics and the Christian Life: A Guide to Making Difficult Decisions (VanDrunen)
Bioethics: A Primer for Christians (Meilaender)
I think VanDrunen's is the superior of the two (and probably the best book I've read this year), although I still recommend Meilaender's because, among other things, VanDrunen himself draws on the work approvingly.