I can understand how you might have doubst, Ebbie, if you've never experienced severe PMS.

My understanding, and my experience bears this out well enough for me to believe it, is that PMS is caused by estrogen dominence. When I ingest estrogens and estrogen like substances in dairy products and eggs (which are given to the farm animals in their feed or as injections), I get severe PMS. If I don't take the progesterone (an estrogen antagonist), I get severe PMS. If I use too much of the estrogen cream, I get severe PMS. When I apply the progesterone cream, most, if not all of the PMS symptoms go away. Some of them go away within minutes.

Anyone who has the symptoms I mentioned, including the endometriosis, uterine fibroids, ovarian cysts, and heavy menstrual flow, can try using a natural, pharmaceutical grade progesterone cream and see if it works for them. My guess is that it will work for them.

(BTW, I don't use the brand in the links I posted. I just posted those because they seemed as good as any other brands of these products.)