Urodynamic investigations in healthy fertile females during the menstrual cycle.

Ten healthy, fertile women were investigated three times during the menstrual cycle in order to study a possible hormonal influence on the urodynamic parameters. On each occasion three urethral pressure profiles were recorded, and cystometry was carried out both in the supine and sitting position followed by pressure-flow studies. No significant changes attributive to menstrual cycle hormonal changes were observed in the profilometry data, the cystometric parameters or in the pressure-flow parameters. Both the short and long term reproducibility of the three times repeated urodynamic parameters were good. Measurements performed regardless of time in the menstrual cycle are thus representative in normal women.