#Vagina shapes professional#

#Vagina shapes professional#

Our search started in 1991 when one of us (PvA) saw a black and white slide of a midsagittal magnetic resonance image of the mouth and throat of a professional singer who was singing вЂњaaa.вЂќ He remembered Leonardo's drawing and wondered whether it would be possible to take such an image of human coitus. We used magnetic resonance imaging to study the anatomy and physiology of human sexual intercourse. 6 The images were of relatively poor quality as they used hand held, self scanning equipment, and none of the images was overview. In 1992 Riley et al published an ultrasound study on copulation. However, they qualified their presumption: вЂњIn view of the artificial nature of the equipment, legitimate issue may be raised with the integrity of observed reaction patterns.вЂќ 4 Masters and Johnson presumed that the greater volume of the uterus was due to engorgement with blood. When sexual excitement without orgasm occurred, the volume returned to normal in 30-60 minutes. This increase disappeared 10-20 minutes after orgasm. 4, 5 Their most remarkable observations regarding sexual arousal in the woman were the backwards and upwards movements of the anterior vaginal wall (vaginal tenting) and a 50-100% greater volume of the uterus. In the 1960s Masters and Johnson made their assessments with an artificial penis that could mechanically imitate natural coitus and by вЂњdirect observationвЂќ-the introduction of a speculum and bimanual palpation. Midsagittal image of the anatomy of sexual intercourse envisaged by R L Dickinson and drawn by R S Kendall 3