December 4, 2013 |
Triplets are out, singletons are in and twins are holding steady. So says a new study in the New England Journal of Medicine that examined birth trends in the United States from1971 to 2011. The authors of the report, from the Centers for Disease Control and Prevention and other institutions, attribute the shift to professional guidelines urging fertility doctors to transfer only one or two embryos to their patients hoping to get pregnant. Those guidelines were first issued by the Society for Assisted Reproductive Technology in 1998, the same year that rates of triplet, quadruplets and even higher-order multiple births peaked in the U.S. Overall, the proportion of actual births that involved more than one baby rose from 1.8% in 1971 to 3.5% in 2011.
July 19, 2010 |
In vitro fertilization treatment can be emotionally grueling and prohibitively expensive, and some people decide they can't — they absolutely can't — go through it again. If only there was a way to accurately predict the chance that such treatments would lead to a real-life bundle of crying, needy, with-you-for-18-years-minimum joy. Stanford University researchers say they've done it, at least for women who've already had one round of IVF. In research published online Monday in Proceedings of the National Academy of Sciences, they explain their model for predicting the odds that a live birth will result from IVF treatment.
September 23, 2010
Doctors and scientists are still learning about what effects in vitro fertilization may have on the health of children. But a new study of children's test scores provides evidence that IVF conception "does not have any detrimental effects on a child's intelligence or cognitive development," the author says. Researchers looked at the academic test scores of 423 Iowa children ages 8 to 17 who were conceived by IVF and at the test scores of 372 matched peers from the same schools. They also analyzed data on the parents of the IVF children, including ethnicity, education, age and marital status.
March 19, 1995 |
These days, most of Dr. Mark V. Sauer's patients are past their reproductive primes. In the past five years, about 200 women in their 40s and 50s have attempted to get pregnant via donor eggs at the USC-IVF Program. About 75% of those midlife patients are trying for their first child, Sauer says. He is straightforward about their chances. Infertile older women get pregnant at the same rates as infertile younger women.
July 19, 2010 |
One of the early fears about in vitro fertilization at its inception more than 30 years ago was that the procedure might cause genetic or other health problems in children conceived in that manner. It's clear that IVF is very safe. However, several studies suggest a slightly higher risk of birth defects and some types of illness among children born via IFV that parents should be aware of. The latest study indicates cancer may occur more often. Previous studies looking for a link between cancer and IVF have found nothing.
January 27, 2011 |
Maternal mortality is rare. But the rates are increasing in the United States and elsewhere for a number of reasons. In an editorial published Thursday, British researchers point out that in-vitro-fertilization-related pregnancies are an additional risk factor for maternal death. The major causes of death to new mothers are rare catastrophes, such as hemorrhage and blood clots. The incidence of these problems is increasing, possibly because more pregnant women today have health problems, such as diabetes, obesity or some other chronic condition.