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
Which of the following statements is true regarding cerclage 
Select and explain. 
A. Shirodkar procedure is most often selected., B. Broad - spectrum antibiotic prophylaxis is required., C. Ideally performed at 10 → 12 weeks gestation., D. Prolapsing membranes can be reduced with Trendelenburg positioning and bladder filling prior to cerclage placement.
D: Prolapsing membranes can be reduced with Trendelenburg positioning and bladder filling prior to cerclage placement.
Answer: D: Prolapsing membranes can be reduced with Trendelenburg positioning and bladder filling prior to cerclage placement. 
Explanation: Timing of surgery is between 12 → 14 weeks gestation
McDonald technique is most used procedure
No need of antibiotic prophylaxis as membranes not ruptured.