title: Cosinor demonstration of circatrigintan (circavigintan) biorhythm in cell component volume of female urethral ejaculate.
abstract: In urethral expulsions of a multipara, aged 37 years, induced by digital stimulation over a time span of almost one and a half 26-day menstrual cycle, the volume of desquamated cellular component changed, according to two nearly identical versions of cosinor, with the period of 22-27 days, with the acrophase between 17th and 23rd day of menstrual cycle and with the amplitude between 0.5 and 1.2 ml/day. The issue testifies to periodic quantitative changes in squamous cells of vaginal type in female urethra, large paraurethral ducts and trigone of the bladder during menstrual cycle, with maximal desquamation during its secretory phase. A link on stop function of urethral epithelium and thus on female miction problems is suggested.
mesh_terms: D000328:Adult; D004847:Epithelial Cells; D005260:Female; D006801:Humans; D008598:Menstruation; D010507:Periodicity; D014521:Urethra / Q000166:cytology*