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Survey study, 1999

Does the menstrual cycle phase affect how the body responds to stress?

Yes. Women in the luteal phase (second half of the cycle) showed higher cortisol responses to a stress test than women in the follicular phase.

Early or limited evidence 81 healthy adults: 20 men, 19 women in follicular phase, 21 in luteal phase, 21 on oral contraceptives

What they did

Researchers exposed 81 healthy adults (20 men, 19 women in their follicular phase, 21 in their luteal phase, and 21 taking oral contraceptives) to a stress test and an ACTH hormone injection. They measured cortisol levels multiple times throughout the day.

What they found

Women in the luteal phase had higher salivary cortisol responses to both the stress test and the ACTH injection compared to women in the follicular phase. Women on oral contraceptives showed cortisol patterns similar to women in the follicular phase.

What it means for you

Menstrual cycle phase appears to influence how the body's hormones respond to stress, with the luteal phase showing a stronger response. The main limit is that all participants were healthy adults without reported PMS or PMDD symptoms, so it's unclear if these hormone differences occur in women with menstrual cycle disorders.

81

Total adults in study

21

Women in luteal phase

19

Women in follicular phase

About the study

Original title
Impact of gender, menstrual cycle phase, and oral contraceptives on the activity of the hypothalamus-pituitary-adrenal axis
Authors
Kirschbaum C, Kudielka BM, Gaab J et al.
Journal
Psychosomatic medicine
Year
1999
Study design
Survey study
Participants
21
What was tested
Stress test and ACTH hormone injection

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