This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Physiological Changes of Pregnancy, Subject name: Gynaecology & Obstetrics
During pregnancy, maximum urinary hCG level is reached in: 
Select and explain. 
A. 30 days, B. 50 days, C. 70 days, D. 90 days
C: 70 days
Answer: C: 70 days 
Explanation: Placenta stas producing hCG 8 days post feilization hCG values keep on increasing and reach maximum at 10 weeks(60-70 days) After 10 weeks, hCG levels begin to decline and are minimum at 16 weeks. After 16 weeks,hCG value reaches plateau.