Changes in electrical impedance of the vaginal medium during the menstrual cycle of female rhesus monkeys (Macaca mulatta).
Changes in electrical impedance of the vaginal medium during the menstrual cycle were recorded in female Rhesus monkeys using electrical probe and were correlated with estradiol-17 beta and progesterone plasma concentrations. A gradual decrease in impedance was observed during the follicular phase, the lowest values being observed between days 12-17 of the cycle. Impedance increased again during the first third of the luteal phase until day 21. The reversal of the impedance gradient's sign was nearly concomitant with the appearance of a detectable plasma progesterone concentration. These results support the use of vaginal impedance measurements as a help for the diagnosis of the periovulatory time in the female Rhesus monkey.
Fischer
L
L
Ministère de la Défense, Centre d'Etudes et de Recherches de Médecine Aérospatiale, Paris, France.
Germain
G
G
Florence
G
G
Milhaud
C
C
D000818:Animals; D004553:Electric Conductivity; D004958:Estradiol / Q000097:blood; D005260:Female; D008253:Macaca mulatta / Q000502:physiology*; D008597:Menstrual Cycle / Q000502:physiology*; D010061:Ovulation Detection / Q000662:veterinary; D011374:Progesterone / Q000097:blood; D014621:Vagina / Q000502:physiology*
D011374:Progesterone; D004958:Estradiol