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Birth, fetal growth-restriction and perinatal mortality rates among singletons vs twins and nulliparous vs parous women. Legend text: Gestational age-specific birth rates (left) and fetal growth-restriction rates (right) in relation to perinatal mortality rates among singletons vs twin births (upper) and among births to nulliparous vs parous women (lower), Canada (excluding Ontario) 1991–97.
