<prompt> Pearl index is defined as?Accidental pregnancies per 1000 women-years of exposureAccidental pregnancies per 100 women-years of exposureAccidental pregnancies per 10 women-years of exposureAccidental pregnancies per women-years of exposure  <response>: ANSWER: B Accidental pregnancies per 100 women-years of exposureREF: Parks 22 Ed page 471, Dutta 6th ed p. 532Repeat Post Diploma June 2012, December 2011, June 2009 SeeFootnote of APPENDIX-115 METHODS OF CONTRACEPTION 