Department of Gynecology and Pathophysiology of Human Reproduction, Alma Mater Studiorum-University of Bologna, Via Massarenti, Bologna, Italy.
J Sex Med. 2010 Apr;7(4 Pt 1):1445-53. doi: 10.1111/j.1743-6109.2009.01650.x. Epub 2010 Jan 6.
The existence of the G-spot is controversial.
To evaluate, by the use of three-dimensional (3-D) ultrasonography, the anatomic structures of the urethrovaginal space.
Nineteen (Group I) eumenorrheic young women who experienced, and 20 (Group II) who did not experience a vaginal orgasm underwent two-dimensional (2-D) and 3-D ultrasonography and color Doppler analysis of the urethrovaginal space and of the clitoris during the early follicular phase of the menstrual cycle.
2-D ultrasonographic evaluation of the urethrovaginal space, and color Doppler evaluation of the urethrovaginal main feeding artery and dorsal clitoral arteries; 3-D volume calculation of the urethrovaginal space, and 3-D power Doppler analysis of vascular indices of the urethrovaginal space and clitoral body (vascularization index, flow index, vascularization flow index); hormonal evaluation.
The 3-D reconstruction of the urethrovaginal space demonstrated a gland-like aspect with small feeding vessels. The total length (19.1 + or - 2.7 mm vs. 17.5 + or - 2.1 mm; P = 0.047), measured with 2-D ultrasound, and the 3-D mean volume (0.59 + or - 0.13 mL vs. 0.26 + or - 0.07 mL; P < 0.001) of the structures contained in the urethrovaginal space were significantly higher in Group I than in Group II. The mean time since the last intercourse was 31 + or - 9 hours in Group I and 18 + or - 3 hours (P = 0.033) in Group II. The urethrovaginal space vascularization, the clitoral volume and vascularization, and the circulating hormonal values did not significantly differ among the two groups. The mean volume of the structures contained in the urethrovaginal space was correlated with time since intercourse (r = 0.685; P = 0.021) and with serum testosterone (r = 0.637; P = 0.032) and androstenedione (r = 0.744; P = 0.011).
The structures we observed in the urethrovaginal space have a gland-like aspect and their volume is correlated with both serum androgen concentrations and time since intercourse.
G 点的存在存在争议。
使用三维（3-D）超声评估尿道阴道空间的解剖结构。
19 名（第 I 组）月经正常的年轻女性经历了阴道高潮，20 名（第 II 组）没有经历阴道高潮的年轻女性在月经周期的卵泡早期接受了二维（2-D）和 3-D 超声检查以及尿道阴道和阴蒂的彩色多普勒分析。
2-D 超声评估尿道阴道空间，彩色多普勒评估尿道阴道主要供养动脉和背侧阴蒂动脉；尿道阴道空间的 3-D 体积计算，尿道阴道和阴蒂体的 3-D 能量多普勒分析（血管指数、血流指数、血管化血流指数）；激素评估。
尿道阴道空间的 3-D 重建显示出具有小供养血管的腺体样外观。第 I 组的结构总长度（19.1 ± 2.7mm 比 17.5 ± 2.1mm；P = 0.047）和 3-D 平均体积（0.59 ± 0.13ml 比 0.26 ± 0.07ml；P < 0.001）均显著高于第 II 组。第 I 组的最后一次性交时间平均为 31 ± 9 小时，第 II 组为 18 ± 3 小时（P = 0.033）。两组间尿道阴道空间血管化、阴蒂体积和血管化以及循环激素值无显著差异。尿道阴道空间内结构的平均体积与性交后时间（r = 0.685；P = 0.021）和血清睾酮（r = 0.637；P = 0.032）和雄烯二酮（r = 0.744；P = 0.011）呈正相关。
我们在尿道阴道空间观察到的结构具有腺体样外观，其体积与血清雄激素浓度和性交后时间相关。
