Oral contraception but not menstrual cycle phase is associated with increased free cortisol levels and low hypothalamo-pituitary-adrenal axis reactivity.

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Statistical Power Analysis for the Behavioral Sciences (2nd ed.).

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Impact of Gender, Menstrual Cycle Phase, and Oral Contraceptives on the Activity of the Hypothalamus-Pituitary-Adrenal Axis

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The assessment of the amount of fat in the human body from measurements of skinfold thickness

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Acute Hypothalamic–Pituitary–Adrenal Responses to the Stress of Treadmill Exercise

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