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
Regarding maturation index in pregnancy true is 
Select and explain. 
A. Increased to 25 %, B. More than 10 %, C. Decreased, D. Attains peak value
C: Decreased
Answer: C: Decreased 
Explanation: KPI (maturation index) is low in secretory phase and during pregnancy.