When should one ligate the umbilical cord?
D000328:Adult; D005260:Female; D006470:Hemorrhage / Q000517:prevention & control; D006801:Humans; D007231:Infant, Newborn; D008026:Ligation; D008431:Maternal-Fetal Exchange; D011247:Pregnancy; D013997:Time Factors; D014470:Umbilical Cord