释义 |
EncyclopediaSeeVasavasa previa
va·sa pre·vi·aumbilical vessels presenting in advance of the fetal head, usually traversing the membranes and crossing the internal uterine os.va·sa pre·vi·a (vā'să prē'vē-ă) Umbilical vessels presenting in advance of the fetal head, usually traversing the membranes and crossing the internal cervical os. vasa previa, vasa praeviaThe blood vessels of the umbilical cord presenting before the fetus.See also: vasa |