Pearl Index Diagramm. 100 women over one year of use or 10 women over 10 years. The pearl index will be determined by the number of unintentional pregnancies related to 100 women.
Pearl earrings are clean on front and sides. This function returns 1 on failure otherwise position of matching string starting at zero for the first character. Reflections on pearl surface should be easily recognizable.
100 women can us e a particular contraceptive for 1 year each with the method to be examined.
The pearl index is sometimes used as a statistical estimation of the number of unintended pregnancies in 100 woman years of exposure e g. Index str substr position index str substr return value. Efficacy of a contraceptive method is measured by two methods. Failure rates may be calculated by either the pearl index or a life table method.
