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Spermarche—also known as semenarche—is the beginning of development of sperm in boys' testicles at puberty.[1] It is the counterpart of menarche in girls.[2][3] Depending on their upbringing, cultural differences, and prior sexual knowledge, boys may have different reactions to spermarche, ranging from fear to excitement.[1] Spermarche is one of the first events in the life of a male leading to sexual maturity. It occurs at the time when the secondary sex characteristics are just beginning to develop.[4] The age when spermarche occurs is not easy to determine. However, researchers have tried to determine the age in various populations by taking urine samples of boys and determining the presence of spermatozoa. The presence of sperm in urine is referred to as spermaturia.[3] From various sources, it appears that spermarche occurs between 13 and 15 years of age in most cases.[4][5]


In one study, boys were asked the circumstances in which their first ejaculation occurred. Most commonly this occurred via a nocturnal emission, with a significant number experiencing semenarche via masturbation. Less commonly, the first ejaculation occurred during sexual intercourse with a partner.[6]

See also[edit]


  1. ^ a b Adolescence and Emerging Adulthood: A Cultural Approach, Jeffrey Jensen Arnett, N.J.: Prentice-Hall, 3rd edition, 2006. ISBN 978-0-13-195071-9
  2. ^ Adolescence, E. Atwater, Englewood Cliffs, N.J.: Prentice-Hall, 3rd edition, 1992. ISBN 978-0-13-007469-0
  3. ^ a b Kuhn, Howard E. (1989). "The Onset of Sperm Production in Pubertal Boys". American Journal of Diseases of Children. 143 (2): 190. doi:10.1001/archpedi.1989.02150140080024.
  4. ^ a b Nielsen, C. Thøger; Skakkebæk, Niels E.; Richardson, David W.; Darling, Janet A. B.; Hunter, William M.; Jørgensen, Merete; Nielsen, Aage; Ingerslev, Olaf; Keiding, Niels; Müller, Jørn (1986). "Onset of the Release of Spermatozia (Supermarche) in Boys in Relation to Age, Testicular Growth, Pubic Hair, and Height". The Journal of Clinical Endocrinology & Metabolism. 62 (3): 532–535. doi:10.1210/jcem-62-3-532. PMID 3944237.
  5. ^ Guízar-Vázquez, J. J.; Rosales-López, A.; Ortiz-Jalomo, R.; Nava-Delgado, S. E.; Salamanca-Gómez, F. (1992). "Age of onset of spermaturia (Spermache) in 669 Mexican children and its relation to secondary sexual characteristics and height". Boletin Medico del Hospital Infantil de Mexico. 49 (1): 12–7. PMID 1304761.
  6. ^ Stein, James H.; Reiser, Lynn Whisnant (1994). "A study of white middle-class adolescent boys' responses to ?semenarche? (The first ejaculation)". Journal of Youth and Adolescence. 23 (3): 373–384. doi:10.1007/BF01536725.