Contraceptive trials in Puerto Rico
Results

Despite half of the trial participants dropping out of the experiment and a significant number of pregnancies occurring within the test groups, researchers believed the trials were overall a success. They claimed that the majority of pregnancies occurred when participants either missed pills or withdrew from the study. Thus, they concluded that the pill successfully inhibited ovulation using two steroids: 19-nor-17-ethinyl testosterone and 17-ethinyl estaeneolone. John Rock further proclaimed that the drug could "provide a natural means of fertility control such as nature uses after ovulation and during pregnancy." Enovid was finally approved by the FDA in 1960 as an oral contraceptive.
punctuation:no_comma