In this photograph taken Thursday, Nov. 21, 2013, Ken Ernst, left, and his wife Abigail Ernst, right, pose for The Associated Press with their 2-month-old daughter, Lucy, in their Oldwick, N.J. home. The couple conceived Lucy by using only one embryo through in vitro fertilization. With nearly half of all babies born using advanced fertility help being multiple births, doctors are now urging more couples to attempt pregnancy with just a single embryo.
BOSTON — Doctors are reporting an epidemic — of twins. Nearly half of all babies born with advanced fertility help are multiple births, new federal numbers show.
In the five years since the “Octomom” case, big multiple births have gone way down but the twin rate has barely budged. Twins aren’t always twice as nice; they have much higher risks of prematurity and serious health problems.
Now fertility experts are pushing a new goal: One. A growing number of couples are attempting pregnancy with just a single embryo, helped by new ways to pick the ones most likely to succeed. New guidelines urge doctors to stress this approach.
Abigail and Ken Ernst of Oldwick, N.J., did this to conceive Lucy, a daughter born in September. Using one embryo at a time “just seemed the most normal, the most natural way” to conceive and avoid a high-risk twin pregnancy, the new mom said.
Not all couples feel that way, though. Some can only afford one try with in vitro fertilization, or IVF, so they insist that at least two embryos be used to boost their odds, and view twins as two for the price of one.
Many patients “are telling their physicians ‘I want twins,’” said Barbara Collura, president of Resolve, a support and advocacy group. “We as a society think twins are healthy and always come out great. There’s very little reality” about the increased medical risks for babies and moms, she said.
The Centers for Disease Control and Prevention’s most recent numbers show that 46 percent of IVF babies are multiples — mostly twins — and 37 percent are born premature. By comparison, only 3 percent of babies born without fertility help are twins and about 12 percent are preterm.
It’s mostly an American problem — some European countries that pay for fertility treatments require using one embryo at a time.
The American Society for Reproductive Medicine is trying to make it the norm in the U.S., too. Its guidelines, updated earlier this year, say that for women with reasonable medical odds of success, those under 35 should be offered single embryo transfer and no more than two at a time. The number rises with age, to two or three embryos for women up to 40, since older women have more trouble conceiving.
To add heft to the advice, the guidelines say women should be counseled on the risks of multiple births and embryo transfers and that this discussion should be noted in their medical records.
“In 2014, our goal is really to minimize twins,” said Dr. Alan Copperman, medical director of Reproductive Medicine Associates of New York, a Manhattan fertility clinic. “This year I’m talking about two versus one. Several years ago I was talking about three versus two” embryos.
The one-at-a-time idea is catching on. Only 4 percent of women under 35 used single embryos in 2007 but nearly 12 percent did in 2011. It’s less common among older women, who account for fewer IVF pregnancies, but it is gaining among them, too.
“Patients don’t really want multiples. What they want is high delivery rates,” said Dr. Richard T. Scott Jr., scientific director for Reproductive Medicine Associates of New Jersey, which has seven clinics in that state.
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