How to halve the prematurity rates of in vitro fertilization pregnancies in 4 days

MRC Working Party on Children Conceived by I.V.F.: Birth in Great Britain resulting from assisted conception 1978–87. Br Med J 1990;300:1229–1233 Dehan M: Obstetrical and pediatric outcome after assisted reproductive technologies. French Collaborative study. 7th World Congress on IVF and ET, Paris, June 30–July 3, 1991 Ghazi H, Spielberger C, Kallen B: Delivery outcome after infertility—a registery study. Fertil Steril 1991;55(4):726–732 Williams M, Goldman M, Mittendorf R, Monson R. Subfertility risk of low birth weight. Fertil Steril 1991;56(4):668–671 Spira A, Spira N, Papiernik-Berkauer E, Schwartz D: Pattern of menstrual cycles and incidence of congenital malformation. Early Hum Dev 1985;11:317–324