I was just on cnn.com and found this article about the Catholic Church and it's stance on IVF (and other fertility treatments). It's by Sean Savage. He and his wife Carolyn have been in the news recently because their RE's office implanted another patient's embryos into Carolyn.
http://religion.blogs.cnn.com/2011/05/10/my-take-catholic-church-should-reverse-ivf-opposition/?hpt=C2