This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abnormal labor, Subject name: Gynaecology & Obstetrics
Use of prostaglandins: 
Select and explain. 
A. Missed aboion, B. lind trimester aboion, C. Ectopic pregnancy, D. PPH
A: Missed aboion
Answer: A: Missed aboion 
Explanation: Prostaglandins incites uterine contractions by altering muscle membrane permeability to Calcium ion. Thus it is used in case of missed aboion. (Sheila TB of obstetrics 2nd edtn pg 568 table 63.4)