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Effect of menstrual cycle phase on exercise performance of high-altitude native women at 3600 m
(The Journal of Experimental Biology, 2002)
Summary.
At sea level normally menstruating women show
increased ventilation (VE) and hemodynamic changes due
to increased progesterone (P) and estrogen (E2) levels
during the mid-luteal (L) compared to the mid-follicular
(F) ...
Epidemiological transitions, reproductive health, and the Flexible Response Model
(ECONOMICS AND HUMAN BIOLOGY, 2003)
Abstract.
In concert with improving standards of living since the mid-19th century, chronic and non-infectious diseases replaced infectious diseases as the major causes of mortality in more developed countries. Thus, ...
Interpopulational differences in progesterone levels during conception and implantation in humans
(PNAS, 2004-02-10)
Clinical studies of women from the United States demonstrate a
sensitivity of the ovarian system to energetic stress. Even moder
ate exercise or caloric restriction can lead to lower progesterone
levels and failure to ...
Seasonal modulation of reproductive effort during early pregnancy in humans
(American Journal of Human Biology, 2009-03-03)
Abstract.
Life history theory predicts that early pregnancy presents a relatively low cost, uncontested opportunity for a woman to terminate investment in a current reproductive opportunity if a conceptus is of poor quality ...
A prospective study of early pregnancy loss in humans
(Fertility and Sterility, 2006-08)
Objective: To test two hypotheses: In spontaneous conceptions, early pregnancy loss (EPL) is associated with [1]
inadequate luteal (ovarian) P, and/or [2] elevated follicular (adrenal) P.
Design: A population-based ...
Salivary progesterone levels and rate of ovulation are significantly lower in poorer than in better-of urban-dwelling Bolivian women
(Human Reproduction, 2002)
Agriculturalists in less-developed countries (LDC) have lower progesterone levels than urban industrialized populations. However, it is unknown if urban LDC populations are also relatively lower. We tested whether urban ...
Seasonal and circadian variation in salivary testosterone in rural Bolivian men
(American Journal of Human Biology, 2009-02-19)
Abstract.
Testosterone (T) plays a key role in the increase and maintenance of muscle mass and bone density in
adult men. Life history theory predicts that environmental stress may prompt a reallocation of such investments ...
Does Hypoxia impair ovarian function in Bolivian women indigenous to high altitude?
(HIGH ALTITUDE MEDICINE & BIOLOGY, 2000)
Abstract.
Fertility appears to be reduced in at least some high altitude populations relative to their counterparts at lower elevations. Inferring from the difficulties with reproduction of newcomers to high altitude and ...