Unknown 100 women were surveyed for oral contraceptive pill usage for 24 months, out of which 10 became pregnant. Calculate the pearl index? A 2.5 B 5 C 10 D 20 💡 Explanation 100 women were surveyed for oral contraceptive pill usage for 24 months, out of which 10 became pregnant. Calculate the pearl index? ✓ Correct Answer: B. 5