Michael J Ball
Extract
Since my earlier letter in the August 7 issue of the Journal, (p. 240) some additional information has been received which supports the use of the “morning after pill.” Sarrel at Yale reports only one pregnancy in about 1000 cases given 50 mg. of diethylstilbestrol daily for five days within 72 hours of unprotected intercourse.
Ball MJ. (Correspondence) The “morning-after” pill. Can Med Assoc J. 1971;105(7):691.