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Relationship Between the Cortisol-Estradiol Phase Difference and Affect in Women
1Grand Valley State University, US.
Journal of Circadian Rhythms
|September 14, 2018
Summary
Women's affective disorders may be linked to hormonal circadian rhythms. This study found an optimal 3.6-hour phase difference between cortisol and estradiol rhythms correlated with better affect in women.
Area of Science:
- Endocrinology
- Neuroscience
- Women's Health
Background:
- Affective disorders affect over 12% of women, linked to reproductive cycles and hormonal circadian rhythms.
- Desynchronization of circadian rhythms, particularly cortisol and estradiol, may contribute to affective disorders.
Purpose of the Study:
- To investigate the temporal relationship between cortisol and estradiol rhythms.
- To determine if a cortisol-estradiol phase difference (PD) correlates with optimal affect.
Main Methods:
- Comparative, correlational study with 23 women.
- Salivary samples collected over 24 hours, analyzed with cosinor model.
- Affective state measured subjectively and correlated with cortisol-estradiol PD.
Main Results:
- A significant correlation (p < 0.05) was found between affect measures and the cortisol-estradiol PD.
- An optimal phase difference of 3.6 hours was identified for positive affect.
Conclusions:
- The phase relationship between cortisol and estradiol rhythms is significant for affect.
- This hormonal rhythm interplay may play a role in the development of affective disorders.
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