Fluid Retention Patterns During the Menstrual Cycle
Author Information
Author(s): Colin P. White, Christine L. Hitchcock, Yvette M. Vigna, Jerilynn C. Prior
Primary Institution: McMaster University Medical Centre
Hypothesis
Fluid retention would be maximal during the premenstrual days and decrease thereafter.
Conclusion
Fluid retention scores peaked on the first day of menstrual flow rather than premenstrually.
Supporting Evidence
- Fluid retention scores peaked on the first day of menstruation.
- Scores were higher around menstruation than at midcycle.
- Fluid retention was significantly higher during the perimenstrual window than during the periovulatory/mid-cycle window.
Takeaway
Women often feel bloated during their menstrual cycle, but this study found that the most bloating happens on the first day of their period, not before it.
Methodology
This was a one-year prospective observational study where women recorded daily fluid retention scores in a menstrual diary.
Potential Biases
The comparison between runners and nonrunners was cross-sectional and women self-selected their activity patterns.
Limitations
The study may not generalize to women with clinically abnormal fluid retention or those seeking help for premenstrual symptoms.
Participant Demographics
Healthy, nonsmoking, premenopausal women aged 20-42, mostly Caucasian.
Statistical Information
P-Value
0.065
Statistical Significance
p<0.0001
Digital Object Identifier (DOI)
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