Effect of moderate weight loss on ovarian function assessed by salivary progesterone measurements

American Journal of Human Biology : the Official Journal of the Human Biology Council
C Lager, P T Ellison

Abstract

The effects of moderate, voluntary weight loss on ovarian function are studied by monitoring the daily levels of salivary progesterone in 8 dieting women (18 cycles) and 9 age-matched controls (19 cycles). Both groups of women were within normal standards of weight for height, though the dieters were significantly heavier than the controls. Dieters lost weight at an average rate of 1.9 ± 0.3 kg/mo during the study. Dieters' cycles during periods of weight loss (weight loss cycles) have significantly lower peak levels of luteal progesterone (controls 655 ± 46 pmol/L, weight loss 461 ± 67 pmol/L; P < 0.005) and lower average levels of luteal progesterone (controls 287 ± 30 pmol/L, weight loss 214 ± 23 pmol/L; P < 0.005) than do controls. All control cycles were classified as ovulatory by virtue of at least one salivary progesterone reading ≥ 300 pmol/L. Only 62% of the weight loss cycles were classified as ovulatory by this criterion. Where longitudinal weight data are available both the magnitude and duration of progesterone elevation correlates significantly with net weight change during the preceding cycle and show no significant correlation with net weight change during the current cycle. Examination of individual profiles co...Continue Reading

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