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
Quiscence of the uterine musculature is : 
Select and explain. 
A. Enhanced by progesterone, B. Enhanced by oestrogen, C. Inhibited by Progesterone, D. Enhanced by oestrogen and inhibited by progesterone
A: Enhanced by progesterone
Answer: A: Enhanced by progesterone 
Explanation: Progesterone is responsible for maintaining quiscence (relaxation) of uterine musculature This function of progesterone has been put to use for prevention of aboions: oral, injectable or vaginal micronised progesterones prevention of preterm labour in patients with high risk of preterm delivery like those with past history of preterm delivery, cervical encirclage, uterine anomalies, threatened preterm etc