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Does gender or the menstrual cycle affect colonic transit?

J P Hinds1, B Stoney, A Wald

  • 1Gastroenterology Unit, Montefiore Hospital, University of Pittsburgh School of Medicine, Pennsylvania.

The American Journal of Gastroenterology
|February 1, 1989
PubMed
Summary

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Colonic transit time does not significantly differ during the menstrual cycle. These findings suggest colonic transit studies can be performed anytime, regardless of oral contraceptive use or gender.

Area of Science:

  • Gastroenterology
  • Reproductive Endocrinology

Background:

  • The luteal phase of the menstrual cycle is characterized by high progesterone levels, which may influence gastrointestinal motility.
  • Previous research has yielded conflicting results regarding the impact of the menstrual cycle on colonic transit time.

Purpose of the Study:

  • To investigate whether colonic transit slows during the high progesterone luteal phase of the menstrual cycle.
  • To compare colonic transit times between different phases of the menstrual cycle, women using oral contraceptives, and male controls.

Main Methods:

  • Colonic transit studies were conducted using radiopaque markers.
  • Participants included women in the follicular phase, luteal phase, and those on oral contraceptives, compared to male controls.
Keywords:
BiologyContraceptionContraceptive Methods--pharmacodynamicsData CollectionDemographic FactorsEndocrine SystemFamily PlanningGastrointestinal Effects--changesHormonesMenstrual CycleMenstruationOral Contraceptives--pharmacodynamicsPhysiologyPopulationPopulation CharacteristicsProgestational HormonesProgesterone--analysisReproductionResearch MethodologySex Factors

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Main Results:

  • No significant differences in colonic transit were observed between the follicular and luteal phases of the menstrual cycle.
  • While colonic transit appeared slower in women than men, this difference was not statistically significant.
  • Transit times in women using oral contraceptives were comparable to those in the natural menstrual cycle.

Conclusions:

  • Colonic transit time is not significantly affected by the phase of the menstrual cycle.
  • Oral contraceptive use does not appear to alter colonic transit.
  • Colonic transit studies can be reliably performed throughout the menstrual cycle and in women using oral contraceptives.
  • A unified standard for normal colonic transit values can be applied to both men and women.