Exercise as a risk factor for infertility with ovulatory dysfunction.

Green, B B; Daling, Janet R.; Weiss, Noel S.; Liff, Jonathan M.; Koepsell, Thomas D.

doi:10.2105/ajph.76.12.1432

Cited by 47 publications

(39 citation statements)

References 16 publications

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“…Biologic evidence supports a hypothesis that physical activity affects implantation, and several epidemiologic studies indicate an association between self-reported frequent vigorous activity and fertility (10–12). A study of 2,232 infertile women undergoing IVF found that those who reported exercising ≥4 hours/week for the past 1–9 years were less likely to conceive and have a live birth than women without a history of exercising (13).…”

mentioning

confidence: 72%

Association of physical activity in the past year and immediately after in vitro fertilization on pregnancy

Evenson

Calhoun

Herring

et al. 2014

Fertility and Sterility

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Objective To estimate the association of physical activity on in vitro fertilization (IVF). Design Prospective cohort study. Setting Academic infertility clinic. Patient(s) Women (n = 121) undergoing nondonor IVF embryo transfer (fresh or frozen). Intervention(s) The women completed a questionnaire on past year physical activity and wore an accelerometer from embryo transfer to serum pregnancy testing. Main Outcome Measure(s) Implantation, intrauterine gestation, and live birth. Result(s) Based on self-reported past year physical activity, the adjusted odds of intrauterine gestation was higher among those that had higher continuous active living (odds ratio [OR] 1.96, 95% confidence interval [CI] 1.09–3.50), sports/exercise (OR 1.48, CI 1.02–2.15), and total activity (OR 1.52, 95%CI 1.15–2.01) indices. After embryo transfer, women did almost no vigorous activity (median 0 min/d) as measured by the accelerometer. More of their time was spent in light activity (median 3.0 h/d) and sedentary behaviors (median 9.3 h/d). Accelerometer-measured physical activity and sedentary behavior after embryo transfer were not associated with any IVF outcome. Conclusion(s) An active lifestyle in the preceding year favorably impacted the IVF outcome. After embryo transfer, women engaged in mostly light physical activity and sedentary behaviors; therefore, the impact of vigorous physical activity on implantation could not be determined.

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mentioning

confidence: 72%

Association of physical activity in the past year and immediately after in vitro fertilization on pregnancy

Evenson

Calhoun

Herring

et al. 2014

Fertility and Sterility

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“…Indices of ovarian suppression, e.g. amenorrhoea, anovulatory cycles and inadequate luteal phases, are associated with dieting and exercise in women from developed countries, and with low-calorie diet and intense workload in women from developing countries (Warren 1983;Prior 1985;Green et al 1986;Howlett 1987;Henley & Vaitukaitis 1988;Ellison et al 1989;Cumming 1993;Rosetta 1993;Panter-Brick & Ellison 1994). However, interpreting the functional signi¢cance of ovarian suppression induced by physical activity has been di¤cult for two principal reasons.…”

Section: Introductionmentioning

confidence: 99%

Physical work causes suppression of ovarian function in women

Jasieńska

Ellison

1998

Proc. R. Soc. Lond. B

137

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The suppression of reproductive function is known to occur in women engaging in activities that require high energetic expenses, such as sport participation and subsistence work. It is still unclear, however, if reproductive suppression is a response to high levels of energy expenditure, or only to the resulting state of negative energy balance. To our knowledge, this study provides the ¢rst evidence that work-related energy expenditure alone, without associated negative energy balance, can lead to the suppression of reproductive function in women. We document suppression of ovarian function expressed as lowered salivary progesterone levels in women from an agricultural community who work hard, but remain in neutral energy balance. We propose two alternative evolutionary explanations (the`pre-emptive ovarian suppression' hypothesis and the`constrained down-regulation' hypothesis) for the observed results.

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“…The results of these studies show that physical stress may influence hypothalamic as well as pituitary function and reproductive performance. [3][4][5][6][7] However, it is questionable to generalise results from extremely fit women with low body fat to women who are exposed to typical, strenuous, occupational exertion. Additionally, most studies on women exposed to strenuous work such as shiftwork, heavy lifting, standing, and psychological job stress, have focused on adverse pregnancy outcomes.…”

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confidence: 99%

Are long working hours and shiftwork risk factors for subfecundity? A study among couples from southern Thailand.

et al. 1998

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Objective-To estimate the eVect of long working hours and shift work on time to pregnancy. Methods-Cross sectional samples with retrospective data collection from two 700 bed hospitals at secondary to tertiary care level in Hatyai district, Songkhla Province, Thailand. The study was conducted from March 1995 to November 1995 among 1496 pregnant women attending the antenatal clinics. Subfecundity was defined as time to pregnancy longer than 7.8, 9.5, or 12 months (time to pregnancy was calculated from the date at which the couples started having sexual relations without any contraception until last menstrual date). Results-The descriptive analyses were restricted to 1201 planned pregnancies and the analytical part to 907 working women. Separate analyses on primigravid women were also done. Logistic regressions adjusted for age, education, body mass index, menstrual regularity, obstetric and medical history, coital frequency, and potential exposure to reproductive toxic agents, showed an odds ratio (OR) associated with female exposure to long working hours of 2.3 (95% confidence interval (95% CI) 1.0 to 5.1) in primigravid and 1.6 (1.0 to 2.7) in all pregnant women. Male exposure to long working hours and shiftwork showed no association with subfecundity. The OR of subfecundity was highest when both partners worked >70 hours a week irrespective of the cut oV point used (OR 4.1 (95% CI 1.3 to 13.4) in primigravid women; OR 2.0 (95% CI 1.1 to 3.8) in all pregnant women). Conclusions-Long working hours is a risk factor for subfecundity especially for women. Shiftwork was not associated with subfecundity in this study. (Occup Environ Med 1998;55:99-105)

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Exercise as a risk factor for infertility with ovulatory dysfunction.

Cited by 47 publications

References 16 publications

Association of physical activity in the past year and immediately after in vitro fertilization on pregnancy

Association of physical activity in the past year and immediately after in vitro fertilization on pregnancy

Physical work causes suppression of ovarian function in women

Are long working hours and shiftwork risk factors for subfecundity? A study among couples from southern Thailand.

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