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
All of the following are methods of Induction of labour except : 
Select and explain. 
A. Estrogen, B. Oxytocin, C. Stripping of membrane, D. PGE7
A: Estrogen
Answer: A: Estrogen 
Explanation: Estrogen