HPA axis activity across the menstrual cycle - a systematic review and meta-analysis of longitudinal studies

Front Neuroendocrinol. 2022 Jul:66:100998. doi: 10.1016/j.yfrne.2022.100998. Epub 2022 May 18.

Abstract

Differential HPA axis function has been proposed to underlie sex-differences in mental disorders; however, the impact of fluctuating sex hormones across the menstrual cycle on HPA axis activity is still unclear. This meta-analysis investigated basal cortisol concentrations as a marker for HPA axis activity across the menstrual cycle. Through a systematic literature search of five databases, 121 longitudinal studies were included, summarizing data of 2641 healthy, cycling participants between the ages of 18 and 45. The meta-analysis showed higher cortisol concentrations in the follicular vs. luteal phase (dSMC = 0.12, p =.004, [0.04 - 0.20]). Comparisons between more precise cycle phases were mostly insignificant, aside from higher concentrations in the menstrual vs. premenstrual phase (dSMC = 0.17, [0.02 - 0.33], p =.03). In all included studies, nine samples used established cortisol parameters to indicate HPA axis function, specifically diurnal profiles (k = 4) and the cortisol awakening response (CAR) (k = 5). Therefore, the meta-analysis highlights the need for more rigorous investigation of HPA axis activity and menstrual cycle phase.

Keywords: Allopregnanolone; Cortisol; Estradiol; Estrogen; Female; HPA axis; HPG axis; Menstrual cycle; Progesterone; Women.

Publication types

  • Meta-Analysis
  • Review
  • Systematic Review
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Female
  • Humans
  • Hydrocortisone* / analysis
  • Hypothalamo-Hypophyseal System* / physiology
  • Menstrual Cycle / physiology
  • Middle Aged
  • Pituitary-Adrenal System / physiology
  • Saliva / chemistry
  • Young Adult

Substances

  • Hydrocortisone