A variety of things can cause low estrogen. The main source of estrogen is in the ovaries, so anything which affects the ovaries will affect estrogen levels. Young women and women over the age of 40 have different causes of low estrogen in most cases.
Younger women often experience decreased estrogen due to:
* Too much exercise * Pituitary gland issues * Kidney disease * Eating disorders * Ovarian failure * Turner syndrome
In women age 40 and over, low estrogen could point towards the start of menopause. This is completely natural, yet poses health issues for any woman. This phase of life is called perimenopause.
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