Send to:

Choose Destination
See comment in PubMed Commons below
BMC Psychiatry. 2003 Dec 10;3:20.

Sex difference in response to stress by lunar month: a pilot study of four years' crisis-call frequency.

Author information

  • 1Science and Technology Studies Department, University College London, Gower St, London WC1E 6BT, UK.



This study is in response to the question of whether the moon can influence daily levels of stress.


Four years of telephone-call frequency data were obtained from a single crisis-call centre. We used the method of lunar-day numbers 1 to 29 for analysis. We also tested the concept of 'strong moons' as occurring when the Sun was near to the lunar-node axis.


An increase in calls was recorded from females and a decrease in calls by males during the new moon period, suggesting a sex difference in response, and there were proportionally more calls by males a fortnight later. A comparable swing in the male/female call-ratio on a weekly basis over Fridays and Saturdays was noted. Limitations of staffing at the call-centre prohibited comment on seasonal correlations.


Lunar-related studies of stress should endeavour to separate the data by sex or the effect can be lost. Distress-calls by women were more strongly linked to the lunar month than were those by men.

[PubMed - indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for BioMed Central Icon for PubMed Central
    Loading ...
    Write to the Help Desk