This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Obstetrics, Subject name: Gynaecology & Obstetrics
The following is associated with increased risk for :- 
Select and explain. 
A. Premature rupture of membranes, B. Post paum haemorrhage, C. Fetal exsanguination before labour, D. Fetal NTD's
C: Fetal exsanguination before labour
Answer: C: Fetal exsanguination before labour 
Explanation: Velamentous placenta - The umbilical cord vessels travel within the membrane before reaching placental margin . - Rupture of the membranes involving the overlying vessels lead to vaginal bleeding. - As it is entirely fetal blood, this may result in fetal exsanguination and even death in more than 50% of cases. This condition is actually called 'Vasa pre" when these membraneous vessels overlie the cervical os