Linked from

The 39 pages that link to Testosterone, each with the reason it gives.

• EstrogenCompared with: It is an androgen and estrogen precursor, but its primary actions differ.

• PubertyRelated: Increasing levels contribute to voice changes, muscle growth, and other pubertal traits.

• Steroid hormoneBroader topic: It represents the androgen class of steroid hormones.

• SpermatogenesisRelated: High local testosterone levels are required for normal progression of sperm development.

• AndrogenBroader topic: It is the major circulating androgen in most adult men.

• Luteinizing hormoneRelated: LH stimulates Leydig cells to produce this principal testicular androgen.

• Androgenetic alopeciaNarrower topic: It is the precursor from which dihydrotestosterone is made.

• EstradiolRelated: Aromatase converts testosterone directly into estradiol.

• Anabolic steroidRelated: It is the natural androgen that many anabolic steroids imitate or modify.

• Androgen receptorRelated: It is the principal circulating androgen that activates the receptor.

• DihydrotestosteroneRelated: 5α-reductase converts testosterone into DHT in androgen-responsive tissues.

• SteroidogenesisBroader topic: Gonadal steroidogenesis produces testosterone from cholesterol-derived intermediates.

• AggressionRelated: Its relationship with aggression is context-dependent, not a simple hormone-to-violence link.

• Androgen insensitivity syndromeRelated: Testosterone is present, but affected cells respond inadequately to its signals.

• Klinefelter syndromeRelated: Reduced testosterone production can contribute to features associated with the condition.

• Male infertilityRelated: Abnormal levels can indicate endocrine problems affecting fertility.

• TestisRelated: The testis is its principal source in adult males.

• AntlerRelated: Seasonal changes in testosterone help trigger antler mineralization, velvet loss, and casting.

• CastratoRelated: Removing the testes before puberty sharply reduced the hormonal changes that deepen the voice.

• Sexual differentiationRelated: Its actions support Wolffian duct development and contribute to external genital differentiation.

• AromataseRelated: Its conversion demonstrates aromatase’s role in producing estrogen from androgens.

• FinasterideRelated: Finasteride reduces its conversion to dihydrotestosterone without directly blocking testosterone production.

• Testosterone replacement therapyNarrower topic: Replacement supplies this hormone when endogenous production is insufficient.

• Delayed pubertyRelated: Low levels can explain absent or slowly progressing male pubertal changes.

• Sex hormone-binding globulinRelated: Testosterone is a major SHBG ligand, and its bound fraction depends on SHBG concentration.

• VasectomyRelated: Vasectomy does not interrupt testosterone production by the testes.

• 5α-reductaseRelated: It supplies the substrate that 5α-reductase converts into dihydrotestosterone.

• LibidoRelated: Testosterone can influence libido, though its level alone does not predict an individual’s desire.

• Male reproductive systemBroader topic: It is the principal androgen produced by the testes.

• Caster SemenyaRelated: The contested rules use testosterone concentration as an eligibility criterion for specified events.

• EstroneCompared with: It is an androgen rather than an estrogen, though it can be converted into estrogens.

• Facial hairBroader topic: Testosterone and its derivatives influence facial-hair development.

• Leopold RužičkaBroader topic: Ružička and colleagues synthesized testosterone in 1935, clarifying its chemical structure.

• Adolf ButenandtBroader topic: Butenandt’s group synthesized testosterone in 1935 after its isolation by other researchers.

• BeardBroader topic: Testosterone contributes to facial-hair development, though follicle sensitivity also matters.

• DehydroepiandrosteroneRelated: DHEA can be converted through intermediate steroids into testosterone in peripheral tissues.

• AndrologyRelated: Its levels and actions are central to evaluating sexual function, puberty, and hypogonadism.

• NandroloneCompared with: Nandrolone is structurally related to testosterone but differs in metabolism and tissue effects.

• StanozololCompared with: It is the body’s principal androgen, unlike synthetic stanozolol.