4Dechaud H,Picot MC, Hedon B,et al. First trimester multifetal pregnance reduction : evalutation of technical aspects and risks from 2756 cases in the literaterature. Fetal Diagn Ther, 1998,13:261 - 265.
5Berkowitz RL, Lynch L. Selective reduction : an unfortunate misnomer.Obstet Gynecol, 1990,75:873-874.