It does this because the eggs in the ovaries have slowed in their maturation process. When all the eggs are gone , the menses stops. Let's look at why this myth is a myth. The form of estrogen that is needed by the body in middle life changes. This better form of estrogen is produced by the adrenal glands.
Adrenal glands sit atop the kidneys .
They have a variety of functions. DHEA is a hormone that keeps us immune to many diseases including cancer. Like all hormones it should not be taken in from outside the body. The gland responds to chemical and electromagnetic information so it shuts down. The problem - every gland does much more than meets the eye.