<unk> y (VPG, VPP) is a technique using light to measure the amount of blood in the walls of the vagina. The device that is used is called a vaginal photometer.
Vaginal photoplethysmograph
Vaginal ultrasonography
Sims' vaginal speculum
Vaginal wet mount
Postcoital test
Genitography
Rectovaginal examination
Obstetric ultrasonography