When Nadya Suleman, 33, had her eight children at a Kaiser Permanente hospital in Bellflower, California, one medical guideline had already been broken. The American Society for Reproductive Medicine recommends that a woman under the age of 35 should have no more than two embryos implanted by way of in vitro fertilization . That limit was chosen, says Sean Tipton, director of public affairs for the Society, in order to avoid multiple births through IVF which exposes both mother and offspring to significant health risks.