Word: menstrual
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...comparable low doses simply by breathing, drinking and especially eating. Some of the suspect chemicals have physiological effects similar to those of estrogen and other sex hormones, or they at least interact with them; they might reasonably be expected to interfere with processes involving these hormones, such as the menstrual cycle and sperm production...
...Women who have breast-cancer surgery during the second half of their menstrual cycle are less likely to have a relapse than those who have surgery earlier...
...fact, the pill has many benefits, according to Chapin. It protects from ovarian and endometrial cancer and regulates the menstrual cycle, decreasing both cramps and flow. And the pill can sometimes improve acne...
...sperm. She also cites the existence of spiral-shaped arteries in the uterus. These specialized blood vessels constrict and dilate in a sequence timed to induce menstruation. And, she claims, the blood that washes over the uterine walls differs from blood that circulates throughout the rest of the body. Menstrual blood lacks ingredients that cause clotting and is rich in special immune cells called macrophages. Even so, says Debrovner, "there is no reason to believe that blood, no matter what it contains, is going to wash away infection. It just doesn't work like that. It's not like blood...
Taking a page from Profet's own method, some critics challenge her by citing history. Today's women can have 400 menstrual periods over a lifetime, but earlier women probably had only a few dozen. Without birth control, they spent most of their reproductive lives pregnant or nursing. "Women were never meant to menstruate on an ongoing basis," says Dr. David Olive, the head of endocrinology at Yale University medical school. If menstruation is supposed to be a rare phenomenon, then how can it be a primary defense against infection? In fact, it may turn out that menstruation...