Thus the flow of research funding does not extend to products which cannot be patented. The answer is quite simple, really. Ample medical research regarding progesterone was carried on in the 1940's through the 1960's, and amply reported in mainline, recognized medical literature. If progestins were the equivalent of Natural Progesterone in effect and safety, the argument would be moot. Patients are aware that they cannot leave their health care solely in the hands of the doctor.
Progesterone is one of two primary hormones produced by the female body.
When a woman's monthly cycle is functioning correctly, oestrogen is the dominant hormone during the first two weeks after the start of her menstrual cycle. In response to ovulation, oestrogen levels drop and progesterone levels rise and assume dominance for the final two weeks of the month. When progesterone levels drop the next menstrual cycle begins in about 48 hours. Progesterone is used by the body for the production of oestrogen and cortisone. Animals in industrialized countries, especially the U.S., are routinely fed synthetic hormones and eat grain and grasses that are laden with pesticides.