The birth control pill, introduced in 1960, was one contributing factor of declining birth rates. Initially, the pill spread rapidly amongst married women as an approved treatment for menstrual disturbance. However, it was also found to prevent pregnancy and was prescribed as a contraceptive in 1964. The pill, as it became commonly known, reached younger, unmarried college women in the late 1960s when state laws were amended and reduced the age of majority from 21 to ages 18–20. These policies are commonly referred to as the Early Legal Access (ELA) laws.