with birth control advocate margaret sanger asked gregory pincus to come up with a birth control pill he knew one of the hardest parts of the process would be the large scale human trails necessary pincus had found a way to test the contraceptive powers of progeterone on a women and sidetep massachusests rigid anti birth control laws although pincus and rock camouflaged the true purpose of their study the tests would be hitoric the first human trails of an oral contraceptive the pill rock reported in his feelings the medical word took immediate notice of what it called the rock rebound rock had crossed the great divide between animal and human testing and pincus soon asked him to collaborate on human for pill