title: [The course of labor and pregnancy in cases of twins].
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D007234:Infant, Premature; D007743:Labor, Obstetric; D011247:Pregnancy; D011272:Pregnancy, Multiple; D014427:Twins
vernacular_title: Uwagi w sprawie ciazy i porodu bliźniaczego