Like emergency contraception, all hormonal birth control methods have the capability to cause an abortion (the pill,1 patch,2 mini-pill,3 shot,4 vaginal ring,5 intrauterine devices,6 etc.).
Hormonal contraceptives attempt to stop the release of the egg from the ovary, thicken cervical fluids to prevent fertilization (pregnancy) and thin the lining of the uterus to prevent implantation.
Hormonal contraception does not always stop ovulation. When breakthrough ovulation occurs, there is a possibility you can get pregnant (fertilization of the egg). Studies have shown that ovulation rates in women taking oral contraceptives ranged from 1.7 to 28.6% per cycle. For women taking progestin only pills (the mini-pill) ovulation rates range from 33 to 65%.7 When these contraceptives do not stop pregnancy, they are designed to cause an abortion by making it diff icult for the embryo to implant and receive nourishment from the mother. Birth control manufacturers insist that their products do not terminate an existing pregnancy. However, they have redefined the terms “conception” and “pregnancy” to mean implantation rather than fertilization (implantation happens 7–10 days after fertilization).8
1“Products.” Janssen United States. 2016. Web. | 2Ibid. | 3Ibid. | 4Pfizer Inc., Pfizer Pharmaceutical Products “Depo-Provera US Physician Prescribing Information” May 2006. | 5“NuvaRing ® (etonogestrel/ethinyl Estradiol Vaginal Ring) Initial U.S. Approval: 2001.” 2014. Web. | 6“MIRENA (levonorgestrel - Releasing Intrauterine System) Initial U.S. Approval: 2000.” Bayer HealthCare Pharmaceuticals, Oct. 2015. Web. | 7Larimore, W. L., and Joseph B. Stanford. “Postfertilization Effects of Oral Contraceptives and Their Relationship to Informed Consent.” Archives of Family Medicine 9.2 (2000): 126-33. Print. | 8Obstetrics & Gynecology 26.3 (1965). Print. | 9“Products.” Janssen United States. 2016. Web.