EntityQ6255337· pop 10· linked from 33 articlesJohn RockSign in to saveAmerican scientistListeners · Last.fmListeners291Total plays1,491 <a href="https://www.last.fm/music/john+rock">Read more on Last.fm</a>via Last.fm · john rockConnectionsUnited States Food and Drug AdministrationEntitycombined oral contraceptive pillEntityCategories1890 births1984 deaths20th-century American peopleAmerican gynecologistsAmerican obstetriciansCatholics from MassachusettsHarvard Medical School alumniHarvard Medical School facultyPeople from Marlborough, Massachusetts