The device is used to try to obtain an objective measure of a woman's sexual arousal. There is an overall poor correlation (r = 0.26) between women's self-reported levels of desire and their VPG readings.
Vaginal photoplethysmograph
Vaginal ultrasonography
Sims' vaginal speculum
Vaginal wet mount
Postcoital test
Genitography
Rectovaginal examination
Obstetric ultrasonography