As things currently work, The American Society for Reproductive Medicine (ASRM) provides guidelines.

FORBES: Balancing the Rights of Donor Offspring With Those of Donors: But What About Parents?

The American Society for Reproductive Medicine, a trade group representing fertility doctors, doesn't have a policy on doctors making the loans.

WSJ: In Vitro a Fertile Niche for Lenders

Cases like these, while tragic, are exceedingly rare, said Dr. David Adamson, a reproductive endocrinologist and past president of the American Society for Reproductive Medicine.

CNN: Fertility clinic to couple: You got the wrong embryos

The American Society for Reproductive Medicine recommends no more than two embryos for women under 35 years old and no more than five for women over 40.

CNN: Georgia 'Octomom bill' would limit embryo implants

The American Society for Reproductive Medicine, which represents fertility specialists, launched a Preserve Your Fertility campaign in 2001, which included an upside-down baby bottle that was an hour glass.

WSJ: More Doctors Broach Subject of Women's Age and Fertility

The American Society for Reproductive Medicine acknowledged in a 2004 report that fertility programs may withhold services when they can provide "well-substantiated judgments" that the child will not receive adequate care.

CNN: Commentary: Are eight babies more than enough?

"It's crazy, " said Dr. Walid Saleh, medical director of the Sher Institute for Reproductive Medicine in Dallas, Texas, noting that implanting six embryos clearly violates guidelines set by the American Society for Assisted Reproductive Medicine, which recommends implanting no more than two embryos in a woman under 35.

CNN: Six embryos?! How to avoid a fertility fiasco