The Pearl Index is the value used in the medical sciences to rate the effectiveness of a birth control method. It refers to the number of unwanted pregnancies in 100 couples using any given method for the duration of one year.
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... 7, 1860. Three years later he was sent to Hawaii, where he was ordained on May 24, 1864. On May 10, 1873, at his request, he was permitted to travel to Molokai to help ...