我们于1987年3～4月份对郑州四中随机抽取的145名男生进行了一次性发育调查,内容包括生殖器与阴毛的测定、手腕部X光摄片及身高、体重测量。结果表明,睾丸纵横径均随年龄增长而增加,睾丸纵径与时间年龄和骨龄间均有相关关系存在,且睾丸纵径随骨龄增加的增长比随时间年龄增加的增长更明显。随着睾丸纵、横径的增长,阴茎亦逐渐发育增大。阴毛在12岁时已开始发育。 We conducted a one-time developmental survey of 145 boys randomly sampled in Zhengzhou from March to April 1987, including genital and pubic hair measurements, wrist radiographs, and height and weight measurements. The results showed that the vertical and horizontal testicular diameter increased with age, testicular vertical diameter and time of age and age were related to the existence of bone age, and testicular longitudinal diameter increased with the increase of bone age over time increased more significantly. With the testicular vertical and horizontal diameter of the growth, the penis also gradually grow and develop. Pubic hair at 12 years old has begun to develop.