title: [Certain aspects of twin pregnancy].
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007746:Labor Presentation; D007744:Obstetric Labor Complications; D011247:Pregnancy; D011248:Pregnancy Complications; D014427:Twins
vernacular_title: Niektóre aspekty przebiegu ciazy bliźniaczej.