[Perinatal mortality of twins depending on the birth weight].
D001724:Birth Weight; D005260:Female; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D009031:Moscow; D011247:Pregnancy; D014427:Twins
Perinatal'naia smertnost' bliznetsov v zavisimosti ot vesa pri rozhdenii