Introduction. The anatomy and function of the G-spot remain highly controversial. Ultrasound studies of the clitoral complex during intercourse have been conducted to gain insight into the role of the clitoris and its relation to vagina and urethra during arousal and penetration. Aim. Our task was to visualize the anterior vaginal wall and its relationship to the clitoris during intercourse. Methods. The ultrasound was performed during coitus of a volunteer couple with the Voluson~R General Electric~R Sonography system (Zipf, Austria) and a 12-MHz flat probe. The woman was in a gynecologic position, and her companion penetrated her with his erected penis from a standing position. We performed a coronal section on the top of the vulva during the penetration. Main Outcome Measure. We focused on the size of the clitoral bodies before and after coitus. Results. The coronal section demonstrated that the penis inflated the vagina and stretched the root of the clitoris that has consequently a very close relationship with the anterior vaginal wall. This could explain the pleasurable sensitivity of this anterior vaginal area called the G-spot. Conclusions. The clitoris and vagina must be seen as an anatomical and functional unit being activated by vaginal penetration during intercourse.
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机译：介绍。 G点的解剖结构和功能仍然存在很大争议。在性交过程中对阴蒂复合体进行了超声研究，以了解阴蒂在唤醒和穿透过程中的作用及其与阴道和尿道的关系。目标。我们的任务是在性交过程中可视化阴道前壁及其与阴蒂的关系。方法。超声是在自愿夫妇与Voluson-R General Electric-R超声成像系统（奥地利Zipf）和12-MHz扁平探头的交配期间进行的。这位妇女处于妇科位置，她的同伴从站立的位置用勃起的阴茎穿透了她。在穿透过程中，我们在外阴顶部进行了冠状切面。主要结果指标。我们关注于性交前后阴蒂体的大小。结果。冠状切面表明，阴茎使阴道膨胀，并拉伸了阴蒂的根部，因此与阴道前壁的关系非常密切。这可以解释该前阴道区域称为G点的愉悦感。结论。阴蒂和阴道必须被视为在性交过程中通过阴道渗透而激活的解剖和功能单元。
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