Retrospective analysis of all fresh, nondonor IVF cycles performed in the United States in 2006.
United States.
A total of 91,753 fresh, nondonor IVF cycles in the United States.
None.
Pregnancy rate, live-birth rate, embryos transferred, multiple pregnancy rate.
Overall, nonmandated states had a significantly higher pregnancy rate (38.8 % vs. 35 % ) and live-birth rate (32.2 % vs. 29.1 % ) than mandated states. Nonmandated states also had a significantly higher twin rate (28.1 % vs. 26 % ) and triplet rate (3.9 % vs. 3.4 % ). The average number of embryos transferred was also significantly higher in nonmandated states (2.6 vs. 2.2). These findings were more pronounced in the <35 and 35–37 age groups.
In the last 8 years, despite a reduction in the average number of embryos transferred and multiple pregnancy rates, there is a continued association between mandated IVF coverage, the transfer of fewer embryos, and lower rates of multiple pregnancies and births, particularly in the younger age groups.