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The aim of this study was to evaluate the impact of early androgenic therapy on the testicular secretory hormone profile, and the pathophysiological implications.<\/jats:p><\/jats:sec><jats:sec><jats:title>Patients and methods<\/jats:title><jats:p>In this cross-sectional study, 18 HGA subjects aged 6\u20138\u00a0years were recruited. They were divided into two groups, based on whether or not they had previously undergone testosterone therapy (group 1: 11 untreated subjects; group 2: 7 treated subjects). Serum FSH, LH, testosterone (T), inhibin B (INHB) and anti-M\u00fcllerian hormone (AMH) were determined, and auxological parameters were assessed. Five group 1 patients and four group 2 patients were treated with hCG (human chorionic gonadotropin) for inguinal cryptorchidism; their hormone profile and auxological parameters were assessed both pre- and post-hCG treatment.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Group 1 subjects showed significantly higher testicular volume and higher levels of AMH and INHB (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.0001). Subjects who had undergone hCG therapy showed a significantly higher testicular volume, penis length (respectively,<jats:italic>p<\/jats:italic>\u2009=\u20090.008 and<jats:italic>p<\/jats:italic>\u2009=\u20090.0005 for group 1 and<jats:italic>p<\/jats:italic>\u2009=\u20090.04 and<jats:italic>p<\/jats:italic>\u2009=\u20090.001 for group 2) and T (<jats:italic>p<\/jats:italic>\u2009=\u20090.005 for group 1 and<jats:italic>p<\/jats:italic>\u2009=\u20090.004 for group 2).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>HGA patients undergoing early testosterone therapy show an earlier and persistent suppression of testicular secretory function. At this age, the testes are still responsive to stimulation with hCG. The selection of patients to be treated must be accompanied by a thorough clinical and hormonal evaluation.<\/jats:p><\/jats:sec>","DOI":"10.1007\/s40618-020-01452-w","type":"journal-article","created":{"date-parts":[[2020,10,24]],"date-time":"2020-10-24T13:02:42Z","timestamp":1603544562000},"page":"1483-1490","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Adverse pathophysiological influence of early testosterone therapy on the testes of boys with higher grade sex chromosome aneuploidies (HGAs): a retrospective, cross-sectional study"],"prefix":"10.1007","volume":"44","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5645-5766","authenticated-orcid":false,"given":"M.","family":"Spaziani","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"C.","family":"Tarantino","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"C.","family":"Pozza","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A.","family":"Anzuini","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"F.","family":"Panimolle","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"G.","family":"Papi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"D.","family":"Gianfrilli","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A.","family":"Lenzi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A. 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