A New York Times article outlines the controversy concerning the morning after pill over whether or not the drug may have an embryocidal effect by interfering with implantation. In brief, though the FDA approved labels state that the drug can have that effect, and such statements can be found on the National Institutes of Health and Mayo Clinic websites, there is increasing evidence that Plan B (the most commonly used version of the drug in the USA) does not have that effect. Enquiries by the New York Times led to the deletion of reference to an implantation effect on the website of A.D.A.M., which writes the entries for the NIH website. Richard Doerflinger, associate director of the Secretariat of Pro-Life Activities for the United States Conference of Catholic Bishops, said that he would be “relieved” if the drug did not affect implantation, but did not believe that the issue had been resolved.