“…When follicle stocks fall below a threshold needed to support ovulation, cycling stops (Faddy and Gosden, 1996;McGee and Hsueh, 2000) and, estrogen secretion plummets to levels so low that it remains controversial whether postmenopausal ovaries produce any (Labrie et al, 2011). Many aspects of somatic aging in Western women have been linked with this drop (e.g., Riggs et al, 1998;Pfeilschifter et al, 1978;Turgeon et al, 2006;Stevenson and Thornton, 2007;Wise et al, 2009;Gibbs, 2010;Henn, 2010). Yet postmenopausal declines in physiological competence are not large enough to cause an inflection in mortality (Hamilton, 1966;Gavrilov and Gavrilova, 1991) or stop postmenopausal women from continuing high levels of economic productivity (e.g., Hawkes et al, 1989Hawkes et al, , 1997.…”