What is occurring when some of the umbilical vessels cross the cervical os below the presenting part?
A) Placenta previa
B) Vasa previa
C) Severe abruptio placentae
D) Disseminated intravascular coagulation (DIC)

Question

Quizplus · Accepted Answer

Vasa previa is occurring when some of the umbilical vessels cross the cervical os below the presenting part.The umbilical vessels are not surrounded by Wharton jelly and have no supportive tissue.The presence of placenta previa most likely would be ascertained before labour and would be considered a risk factor for this pregnancy.With the presence of severe abruptio placentae,the uterine tonicity would typically be tetanus (i.e. ,a boardlike uterus).DIC is a pathological form of diffuse clotting that consumes large amounts of clotting factors,causing widespread external bleeding,internal bleeding,or both.

What Is Occurring When Some of the Umbilical Vessels Cross