This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
Vertical transmission of HIV is most likely to occur 
Select and explain. 
A. Early antepartum, B. Late antepartum, C. Intrapartum, D. Postpartum
C: Intrapartum
Answer: C: Intrapartum 
Explanation: Most of the vertical transmission of HIV is likely to occur during labor.