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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 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.
Here’s an important distinction to make, per Dr. Goldman: Perimenopause is a stage, while menopause is a single moment that you reach exactly 12 consecutive months after your last menstrual period.
2003 US mortality table, Table 1, Page 1. In actuarial science and demography, a life table (also called a mortality table or actuarial table) is a table which shows, for each age, the probability that a person of that age will die before their next birthday ("probability of death").
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 ...
"The first 1000-year-old is probably only ~10 years younger than the first 150-year-old."–Aubrey de Grey, 2005 [1]. In the life extension movement, longevity escape velocity (LEV), actuarial escape velocity [2] or biological escape velocity [3] is a hypothetical situation in which one's remaining life expectancy (not life expectancy at birth) is extended longer than the time that is passing.