The Types of Oral Contraceptive.
Overview.
There are currently three general classes of birth prevention pill manufactured in the United States and other countries and used worldwide. These are the high-dose pill, the low-dose pill, and the "mini-pill." The following paragraphs describe these pills and their modes of action.
The High-Dose Pill.
The Searle Pharmaceutical Corporation developed the first oral contraceptive, Enovid, in the late 1950s. In keeping with its defensive anti-lawsuit strategy, the company tested the pill on Puerto Rican women before concluding in 1961 that it was safe for women on the American mainland to use. 1
1 Bogomir M. Kuhar, Ph.D. "Pharmaceutical Companies: The New Abortionists." Reprint 16 from Human Life International, 4 Family Life, Front Royal, Virginia 22630.
Experimentation on foreign women is a typical tactic of the major pharmaceutical companies. They often test birth prevention chemicals and devices on poor women in developing countries so any mistakes or serious health problems are easier to cover up. Poor women on foreign countries have little recourse when their health is destroyed or damaged by this kind of testing.
This is because the companies bring huge amounts of money to their homelands, and protest against the programs can easily be suppressed by local or national governments.
Enovid and other high-dose pills, which have generally fallen out of favor in the United States but are still widely used in developing countries, contained from 1 to 12 milligrams of progestin and/or 60 to 120 micrograms of estrogen, a natural female hormone. This high dosage had a variety of effects, including blurred vision, nausea, weight gain, painful breasts, cramping, irregular menstrual bleeding, headaches, and possibly breast cancer.1
The high-dose pills were primarily two-fold in action. Their primary mechanism suppressed gonadotropin production and therefore ovulation. They also caused changes in the consistency and acidity of cervical mucus, making it more difficult for sperm to penetrate and live in the cervix. Finally, they occasionally caused certain changes in the endometrium (lining of the uterus), making implantation more difficult.
When the high-dose pill functioned by this last mechanism, it was an abortifacient if the woman experienced a "breakthrough" ovulation. Although this occurred only during about 1 to 12 percent of all cycles, it was not the primary intent of the manufacturers.
Beginning about 1975, pill makers, in reaction to bad publicity about the severe side effects of the high-dosage pills, steadily decreased the content of estrogen and progestin in their products.
1 Bogomir M. Kuhar, Ph.D. "Pharmaceutical Companies: The New Abortionists." Reprint 16 from Human Life International, 4 Family Life, Front Royal, Virginia 22630.