Actually, I lied, I do have some stats for you. Check out the 2005 the CDC report In general, is an ART cycle more likely to be successful if more embryos are transferred?
(look at these topics)
In general, is an ART cycle more likely to be successful if embryos are transferred on day 5?
Does the number of embryos transferred differ for day 3 and day 5 embryo transfers?
In general, how does the multiple-infant birth risk vary by the day of embryo transfer?
Section 2C: 2005 ART Report | CDC Reproductive Health