Moderate alcohol intake and menstrual cycle characteristics

Area of Science:

• Reproductive Health
• Epidemiology
• Women's Health

Background:

• Animal studies suggest alcohol disrupts the reproductive system.
• Epidemiological data on alcohol intake and menstrual cycles are limited.

Purpose of the Study:

• To investigate the association between alcohol consumption and menstrual cycle characteristics in Danish women.

Main Methods:

• Cross-sectional study of 82,146 pregnant Danish women (Danish National Birth Cohort).
• Retrospective data collection via telephone interview on alcohol intake and cycle characteristics.
• Logistic regression analysis to assess associations between alcohol consumption categories and cycle irregularity/length.

Main Results:

• High weekly alcohol consumption was not linked to menstrual cycle disturbances.
• Abstainers showed higher odds of irregular and short cycles compared to low consumers.
• No trend of increased cycle disturbances with higher alcohol consumption was observed.

Conclusions:

• Alcohol consumption levels in this study did not substantially affect menstrual cycles.
• Higher odds of cycle disturbances in abstainers may indicate other health issues.
• Findings are generalizable to women who conceive and do not use oral contraceptives prior to pregnancy.