But though Protestants on the whole have left behind contraception as a moral issue, a growing number of Protestant women have begun to reject the pill. Women are prescribed hormonal birth control for many issues: acne, mood swings, irregular or painful or heavy periods. Through her volunteer work with a pro-life sidewalk ministry, Chaney learned about the potential abortifacient effects of hormonal birth control methods, including the pill. Birth control pills and IUDs work in three main ways to prevent pregnancy: a primary means and two secondary backups. Breakthrough ovulation—the release of an egg despite the use of ­hormonal birth control—varies in ­frequency from woman to woman.