Research

Fertility treatments keep multiple births high

Trends in triplets

New estimates of multiple births suggest that while guidelines have reduced IVF’s contribution to the percentage of medically assisted triplet (or higher order) births, non-IVF means are increasing their share.

More than one in three twin births and three of four births of triplets or more in the United States arise from fertility treatments, according to new estimates published in the New England Journal of Medicine. Although in-vitro fertilization (IVF) practices have improved to produce fewer triplets or higher-order births than at peak, multiples from non-IVF treatments continue unabated.