Bengoudifa B, Mieusset R
Groupe de Recherche en Fertilité Humaine, Université Toulouse III-Paul Sabatier, EA 3694, Hôpital Paule de Viguier, 330 Avenue de Grande-Bretagne, TSA 70034, Toulouse Cedex 9, France.
Hum Reprod. 2007 Aug;22(8):2178-82. doi: 10.1093/humrep/dem133. Epub 2007 Jul 10.
Scrotal temperatures in men have been reported to be either similar on both sides or higher on the left than the right scrotum. We aimed to clarify this discrepancy from new data.
Retrospective analyses of scrotal temperatures in men aged 20-52 years measured every 2 min with probes connected to a data collector in three experiments. In Experiment I, eight men have been submitted to four successive body positions for 15 min each, first naked then clothed. Experiment II involved 11 postal employees working in a standing position for 90 min continuously. Experiment III involved 11 bus drivers and a 90 min period of continuous driving. Outcome parameters were left and right scrotal temperatures.
In Experiment I, mean values and kinetics of scrotal temperature differed significantly in the naked and clothed state. In all three experiments, left scrotal temperature in the clothed state was higher than right scrotal temperature in terms of mean values and temperature kinetics.
Lack of thermal symmetry was seen in the right and left scrotum, whether naked or clothed, and this applied regardless of position or activity when clothed. This thermal difference between right and left scrotum could contribute to the asymmetry in the male external genital organs.
据报道，男性双侧阴囊温度要么相似，要么左侧阴囊温度高于右侧。我们旨在通过新数据澄清这一差异。
在三项实验中，对20至52岁男性的阴囊温度进行回顾性分析，使用连接到数据采集器的探头每2分钟测量一次。在实验I中，8名男性依次处于四种身体姿势，每种姿势持续15分钟，先是裸体，然后是着装状态。实验II涉及11名邮政员工，他们持续站立工作90分钟。实验III涉及11名公交车司机，持续驾驶90分钟。观察指标为左右阴囊温度。
在实验I中，裸体和着装状态下阴囊温度的平均值和变化趋势有显著差异。在所有三项实验中，着装状态下左侧阴囊温度在平均值和温度变化趋势方面均高于右侧阴囊温度。
无论裸体还是着装，左右阴囊均存在热不对称现象，着装时无论处于何种姿势或进行何种活动都是如此。左右阴囊之间的这种热差异可能导致男性外生殖器的不对称。
