I think this can be a really touchy subject, but I really can't think of any specific teachings in the Bible that are about it. It's like the debates over abortion and cloning and such as there's nothing said about it much I suppose, and it's a new idea that an old book has to adapt to.

However, as Gear says, I really think that it's between you and God; though I can't think of any reason why the two can't live together