Pearl index is used to calculate:March, September 2009
Ans. A: Accidental PregnanciesMethods of contraception are compared by the Pearl index. A high Pearl index stands for a high chance of unintentionally getting pregnant; a low value for a low chance.The Pearl index will be determined by the number of unintentional pregnancies related to 100 women years. E.g. 100 women can contracept for 1 year each with the method that is going to be examined. If three pregnancies occur during this period in this group, the Pearl index will be 3.0.
Accidental pregnancies
Population
Feility rate
Aboions