Quote from : The Birth of the Pill: How Four Crusaders Reinvented Sex and Launched a Revolution Book

This is when the pill became widely known as The Pill, perhaps the only product in American history so powerful that it needed no name. Women went to their doctors and said they wanted it. They wanted The Pill. Some of them might still have been uncomfortable talking about birth control. Others might have been unsure of its brand name. But The Pill was The Pill because it was the only one that mattered, the one everyone was talking about, the one they needed.