Summary: Teenagers are most vulnerable and negatively impacted by abortion and hormonal contraception.
At a time when their breasts are already growing, induced abortion alters their physiology in a way that results in a much higher risk of subsequent breast cancer.
By choosing abortion, a woman increases her risk of breast cancer in four ways:
she creates in her breasts more places for cancers to start, which is the “independent effect”;
she loses the protective effect that a full-term pregnancy would have afforded her;
she increases the risk of premature delivery of future pregnancies, thus losing the benefit to breast cells that a full-term pregnancy gives; and
she lengthens her susceptibility window.
Following abortion, many teen women take hormonal contraceptives that in most circumstances can elevate the risk of breast cancer even more. Contraceptives containing estrogen-progestin drugs increase breast-cancer risks by causing breast cells to proliferate increasing the chance of mutations leading to cancer cells, and by acting as direct carcinogens. 1
1. Normal Breast Physiology, The Reasons Hormonal Contraceptives and Induced Abortion Increase Breast-Cancer Risk, The Linacre Quarterly 76 (3) (August 2009): pp. 236-249.