If the laws against imparting knowledge of scientific Birth Control were repealed, the 1,000,000 or 2,000,000 women who undergo abortions in the United States each year would escape the agony of the surgeon's instruments and the long trail of disease, suffering and death which so often follows.
--Margaret Sanger.
Considering that we live in an age in which contraception is widely accepted and promoted, I think we can call her prediction an epic fail.
(Note that the estimates of one million abortions a year have been said to be vastly over-estimated.)