100 women, followed up 20 months, with OCPs, 5 became pregnant, Calculate the Pearl Index -: (A) 100, (B) 200, (C) 300, (D) 400
Answer is C. 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