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Primary ovarian insufficiency (premature menopause) due to varying causes, such as radiation therapy, chemotherapy, or a spontaneous manifestation, can also lead to low estrogen and infertility. [17] Hypogonadism (a condition where the gonads – testes for men and ovaries for women – have diminished activity) can decrease estrogen. [18]
Menopause, also known as the climacteric, is the time when menstrual periods permanently stop, marking the end of reproduction. [1] [6] [7] It typically occurs between the ages of 45 and 55, although the exact timing can vary. [8] Menopause is usually a natural change related to a decrease in circulating blood estrogen levels. [3]
Only about 1 percent of women in the U.S. go through menopause before 40, but signs like hot flashes and missed periods are scary. Here's what they could be.
The grandmother hypothesis is a hypothesis to explain the existence of menopause in human life history by identifying the adaptive value of extended kin networking. It builds on the previously postulated "mother hypothesis" which states that as mothers age, the costs of reproducing become greater, and energy devoted to those activities would be better spent helping her offspring in their ...
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The most important risk factors for osteoporosis are advanced age (in both men and women) and female sex; estrogen deficiency following menopause or surgical removal of the ovaries is correlated with a rapid reduction in bone mineral density, while in men, a decrease in testosterone levels has a comparable (but less pronounced) effect. [33] [34]
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