Perinatal Morality Rates Do Not Contain What They Purport to Contain
Lancet 1984 May 26; 1(8387): 1166-1168
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Perinatal Outcome of Singletons and Twins After Assisted Conceptions: A Systematic Review of Controlled Studies Helmerhorst, Frans M.; Perquin, Denise A.M.; Donker, Diane; Keirse, Marc J.N.C. (2004-01-31)OBJECTIVE: To compare the perinatal outcome of singleton and twin pregnancies between natural and assisted conceptions. DESIGN: Systematic review of controlled studies published 1985-2002. STUDIES REVIEWED: 25 studies ...