I've just read interesting article about IVF and selective reduction. Please note that I don't really agree with everything in this article because it's not pro life and they try to make a distinction between selective reduction and abortion where I feel none exists but I think it shows an interesting insight into how the IVF buisness is run.
Duke Journal of Gender Law & Policy: Stacey Pinchuk, A Difficult Choice in a Different Voice: Multiple Births, Selective Reduction and Abortion, 7 Duke J. of Gender L. & Pol'y 29 (2000)