Does use of other hormonal contraceptives such as the long acting progestins cause early abortions?
Norplant, manufactured by Wyeth-Ayerst, and DepoProvera, made by Pharmacia-Upjohn, are made of artificial progestins. Norplant is composed of levonorgestrel and Depo-Provera of medroxyprogesterone. Depo-Provera is a long-acting progestin that is injected every 3 months intramuscularly — it is used worldwide despite the fact that studies have shown that it increases the risk of breast cancer by at least 190% in women who take it for more than 2 years before the age of 25! 35 Norplant is an artificial progestin that consists of a series of Silastic (ie, rubberlike) strips which are filled with levonorgestrel and are implanted under the skin of a woman’s upper arm, slowly releasing the progestin into the woman’s body over a 5-year time period. Use of Norplant has been noted to allow breakthrough ovulation in over 44% of a woman’s monthly cycles 132]. In addition, a study in rabbits conducted by a researcher named Chang [6] has shown that sperm freely reached the rabbits’ fallopian tubes
