Purpose To evaluate the association between physical activity (PA) across the menstrual
cycle and reproductive function. Methods The BioCycle Study (2005–2007) followed 259 …

Relations between physical activity and prospectively collected menstrual cycle
characteristics were examined in two large cohorts. One cohort consisted of women …

Background: Physical activity is associated with reduced risk for breast cancer, perhaps
through reductions in circulating reproductive hormones (estrogens and androgens). There …

Few studies have examined whether activity and adiposity levels typical of American women
affect their risk of ovulatory disorder infertility, and none has examined moderate and …

STUDY QUESTION Is physical activity associated with incident early menopause?
SUMMARY ANSWER Physical activity is not associated with incident early menopause …

OBJECTIVE: To investigate the association between leisure-time physical activity (PA) and
fecundability. DESIGN: Prospective cohort study. SETTING: Internet-based observational …

We investigated whether sexual activity was associated with reproductive function in the
BioCycle Study, a prospective cohort study that followed 259 regularly menstruating women …

An association between physical activity and premenopausal breast cancer risk may be due,
in part, to relationships with sex hormones or growth factors. Therefore, we assessed …

ABSTRACT NELSON, DB, MD SAMMEL, EW FREEMAN, H. LIN, CR GRACIA, and KH
SCHMITZ. Effect of Physical Activity on Menopausal Symptoms among Urban Women. Med …

BACKGROUND Changes in the state of energy balance owing to changes in physical
activity may affect the reproductive system. We evaluated the association between physical …