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
Capillary invasion of corpus luteum begins 
Select and explain. 
A. One day after ovulation, B. 2 days after ovulation, C. 3 days after ovulation, D. 4 days after ovulation
B: 2 days after ovulation
Answer: B: 2 days after ovulation 
Explanation: Capillary invasion begins 2 days after ovulaton and reaches center of corpus luteum by 4th day.