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. 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.
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/9...
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/9...