Social & Preventive Medicine Pearl index is defined as A Accidental pregnancies per 1000 women-years of exposure B Accidental pregnancies per 100 women-years of exposure C Accidental pregnancies per 10 women-years of exposure D Accidental pregnancies per women-years of exposure 💡 Explanation Pearl index is defined as ✓ Correct Answer: B. Accidental pregnancies per 100 women-years of exposure