Social & Preventive Medicine Which of the following is TRUE regarding pearl index? A Failures per 1000 women-years of exposure B Failures per 100 women-years of exposure C Failures per 10 women-years of exposure D Failures per women-years of exposure 💡 Explanation Which of the following is TRUE regarding pearl index? ✓ Correct Answer: B. Failures per 100 women-years of exposure