Sixty four healthy school boys served as additional controls. The main findings were:. It is evident that the first ejaculation occurs within a narrow range of bone age although chronological age shows a much wider variance, as do testicular volume and secondary sexual signs.
It is concluded that registration of the first conscious ejaculation may constitute an useful index of maturation in the male. You can also search for this author in PubMed Google Scholar. Reprints and Permissions. Laron, Z. Age at first conscious ejaculation: A milestone in male puberty..
Pediatr Res 13, Download citation. Issue Date : 01 October Another study evaluated the success of semen sampling in 86 adolescents aged Similar results were reported in other studies on semen sampling in adolescent cancer patients 32 , The lack of confidence by the practitioner obtaining useful samples from adolescents, and the difficulty due to the sensitivity of the topic to discuss with adolescent patient and their families have discouraged practitioners from embracing the practice of offering cryopreservation Moreover, the disparities in the stages of maturity, since puberty may take place anywhere from the age of 10 to 14 years 34 , and the lack of guidance about the age of when to approach patients for semen collection, may cause confusion among some practitioners and further discourage counseling.
We also found that the average adolescent will reach puberty before reaching other sexual milestones, specifically, first experienced ejaculation and intercourse.
Therefore, the use of puberty plus 1. And since first conscious ejaculation is correlated to the reported age of spermarche 28 , this might also predict the success rate of sperm collection. Our reported mean age for the onset of puberty, first experienced ejaculation, and start of masturbation are consistent to what is reported in the literature 35 , However, in our study we demonstrated that the first experienced ejaculation and masturbation as well as puberty were positively correlated; as it is demonstrated in published studies that looked at sign of puberty such as testicular growth and the onset of puberty One might argue that simply by making adolescents comfortable and obtaining a detailed history pertinent to past practices of masturbation and ability to ejaculate, is important in predicting the success of sample collection for semen analysis and cryopreservation.
Many of the subjects are asked to recall features of their development from as many as 20 years prior, and it is possible that the results may contain an element of recall bias. However, when we stratified the patients into older and younger groups there was no statistical different between the two groups.
Studies that tested the validity of self-reported age of menarche found it to be comparable with that of recorded age 38 , and the discrepancies in the reported timing of specific milestone events can be as low as two months It is also possible that subjects with relatively late onset of milestones may be less likely to volunteer for this study, as this may contribute to an element of shame. The issue of fertility preservation and semen cryopreservation is also relevant in the adolescent KS population.
Early sperm retrieval from semen or testicular tissue has been suggested by several investigators KS patients have optimal testicular function after the onset of puberty until mid-puberty, and decline thereafter Therefore, it is arguable at the onset of masturbation and ejaculation, fertility preservation for KS adolescents should be considered to cryopreserve sperm to potentially avoid future invasive surgeries in adulthood. The first experienced ejaculation was positively correlated with age of onset of masturbation.
Thus it is appropriate to consider a request for semen specimens by masturbation from teenagers at one year and six months after the onset of puberty.
Perhaps the onset age of puberty plus 1. Table 1 Questions administrate to subjects Full table. Figure 1 Cumulative age for A start of puberty; B start of masturbation; C first experienced ejaculation; D first experienced intercourse. Table 2 Different intervals for the start of milestones Full table.
Figure 2 Distribution of age for A start of puberty; B start of masturbation; C first experienced ejaculation; D first experienced intercourse. Figure 3 Linear regression analysis between the first experienced Ejaculations and A start of puberty; B first experienced intercourse; C start of masturbation. When to ask male adolescents to provide semen sample for fertility preservation? Transl Androl Urol ;3 1 Share this article Share with email Share with twitter Share with linkedin Share with facebook.
Abstract The age of occurrence of the first conscious ejaculation was registered in boys belonging to two categories: 1 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. 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. Eighty of these reported ejaculations.
There was no correlation between the age at first ejaculation and testicular volume, pubic hair or penis length. It is proposed that the age at the first conscious ejaculation be used as an index of maturation in male puberty.
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