6. Important Dates 1921 In the 1920s, the U.S. birth rate drops by half. Condom reliability is still terrible by modern standards, but people achieved effective birth control by combining condoms, the rhythm method, male withdrawal, diaphragms, and/or intrauterine devices. 1960 The Searle drug company receives FDA approval for Enovid - the first birth control pill. "The Pill" revolutionizes contraception. It's 100% effective -- but has terrible side effects, including life-threatening blood clots. Eventually it's realized that the dose is 10 times too high. 1965 The U.S. Supreme Court strikes down the Comstock laws that banned contraception. 1976 A T-shaped IUD is approved by the FDA, and other designs follow. These devices are inserted by doctors and provide birth control for up to 10 years. They fall out of favor after one - the Dalkon Shield - is found to cause pelvic inflammatory disease in some women. 1980s The modern, low-dose, two- and three-phase birth control pills become available.