100 women, followed up 20 months, with OCPs, 5 became pregnant, Calculate the Pearl Index –
Correct Answer: 300
Description: HWY =Total accidental pregnancies/months of exposure*1200 HWY=5/20*1200= 300 HWY indicates contraceptive efficacy Parks textbook of preventive and social medicine.K Park. Edition 23.Pg no: 510
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Social & Preventive Medicine
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