G
o
o
g
l
e
×
Please click
here
if you are not redirected within a few seconds.
All
Images
News
Videos
Maps
Products
Books
Search tools
Any time
Any time
Past hour
Past 24 hours
Past week
Past month
Past year
All results
All results
Verbatim
Pearl Index
View all
The Pearl Index, also called the Pearl rate, is the most common technique used in clinical trials for reporting the effectiveness of a birth control method.
Wikipedia