Congenital nasolacrimal atresia in infants--a higher incidence in primiparas.
D000015:Abnormalities, Multiple; D000328:Adult; D001722:Birth Order; D004200:Diseases in Twins; D005260:Female; D007839:Functional Laterality; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007765:Lacrimal Apparatus / Q000002:abnormalities*; D007767:Lacrimal Duct Obstruction / Q000151:congenital* / Q000235:genetics; D008297:Male; D011247:Pregnancy; D012737:Sex Factors