From: utzoo!decvax!harpo!seismo!hao!menlo70!sanders
Newsgroups: net.singles
Title: Re: Birth control effectiveness
Article-I.D.: menlo70.150
Posted: Sat Apr  9 11:48:18 1983
Received: Mon Apr 11 01:45:53 1983
References: eagle.877


  The standard method of reporting birth control effectiveness
is in the percentage of a large group of women who do not
become pregneant in one year of use.
  For the sponge, that means a woman stands a 15% chance of getting
pregnant each year.