Desperate women began to phone her, asking where they could go for safe abortions. She launched into activism, abortion rights, feminist groups and Zero Population Growth.
She founded the ZPG Abortion Referral Service in 1970. Between 1970 and 1975, she made more than than 20,000 referrals. She took calls at home day and night, especially after her number was published without her permission, in Playboy!