LONDON — A new study of fertility treatment found that women who get three or more embryos have no better odds of having a baby than those who get just two embryos.
They also have a greater chance of risky multiple births.
“Women who have gone through infertility treatment want the best chance of having a baby, but we need to explain that the data shows transferring more embryos doesn’t actually do that,” said Dr. Scott Nelson, head of reproductive and maternal medicine at the University of Glasgow, who co-authored the study published in Thursday’s issue of Lancet.
In Western Europe, where some countries pay for in-vitro fertilization, or IVF, many authorities recommend a single embryo transfer for women under 37 and a maximum of two embryos for women 37 to 40. For women over 40, three is often the limit by law.
In the United States, there are relatively lax guidelines and a lack of regulation. That country has seen a rise in multiple births, including the highly publicized case of Nadya Suleman, labeled the “octomom.” She had octuplets...