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
Maximum number of oogonia is seen at 
Select and explain. 
A. Puberty, B. 20th week of gestation, C. At birth, D. 20 years age
B: 20th week of gestation
Answer: B: 20th week of gestation 
Explanation: Maximal number of oogonia is achieved at 20th week of gestation.