The truth about multiple births.
Evans
Mark I
MI
D005260:Female; D005307:Fertilization in Vitro / Q000941:ethics / Q000592:standards; D006801:Humans; D017410:Practice Guidelines as Topic; D011247:Pregnancy; D018607:Pregnancy Reduction, Multifetal; D011272:Pregnancy, Multiple; D018456:Reproductive Medicine / Q000592:standards; D012307:Risk Factors