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Wen: There is significant variation in when menopause occurs. Most women go into menopause between ages 40 and 58, with the average age of experiencing menopause being 51, according to the North ...
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: You've officially reached menopause once you've gone a full year without having a period. Postmenopause: You'll stay in postmenopause for the rest of your life, and it's frequently ...
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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 ...
The theories discussed above assume that evolution directly selected for menopause. Another theory states that menopause is the byproduct of the evolutionary selection for follicular atresia, a factor that causes menopause. Menopause results from having too few ovarian follicles to produce enough estrogen to maintain the ovarian-pituitary ...
The menopause describes the end of a woman's reproductive years, and normally happens around the age of 51. The lead-up to this happening is known as the peri-menopause. It starts, on average, at 46.
The allele for slowing life history and extending longevity is not on the Y chromosome. To date a ‘longevity’ gene(s) is still elusive. However, INK4a/ARF situated on the human chromosome 9p21 does appear to act as a tumour suppressor [10] therefore extending longevity. [11] Increasing the ovarian follicular reserve is difficult.
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