![]() There was no correlation between the age at first ejaculation and testicular volume, pubic hair or penis length. ![]() ![]() Despite a wide range in the chronological age at occurrence of the first conscious ejaculation, the mean bone age in all groups, including that with delayed puberty, was 13 1/2 +/- 1/2 years (SD), with a range between 12 1/2-15 1/2 years. (2) A group of 135 boys examined and questioned at their school served as additional controls. All underwent a complete physical examination at intervals of 3 to 6 months, and in most a wrist X-ray was made within three months of the first ejaculation. The age of occurrence of the first conscious ejaculation was registered in 263 boys belonging to two categories: (1) 128 boys (70 normal controls, 22 boys with unilateral cryptorchidism with normal puberty, and 36 boys with delayed puberty) who had been under regular follow-up throughout puberty.
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