title: [The problems of twin pregnancy].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001724:Birth Weight; D005260:Female; D005313:Fetal Death; D005860:Germany, West; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D008875:Middle Aged; D007744:Obstetric Labor Complications / Q000453:epidemiology; D007752:Obstetric Labor, Premature / Q000209:etiology; D011225:Pre-Eclampsia / Q000150:complications; D011247:Pregnancy; D011272:Pregnancy, Multiple; D012737:Sex Factors
vernacular_title: Zum Problem der Zwillingsschwangerschaft.