title: [Perinatal mortality in twin pregnancy].
mesh_terms: D001724:Birth Weight; D005260:Female; D005313:Fetal Death; D005865:Gestational Age; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D007234:Infant, Premature; D007744:Obstetric Labor Complications; D011247:Pregnancy; D011248:Pregnancy Complications; D014427:Twins
vernacular_title: Kaksosten perinataalikyuoleisuus.