Talk:Testosterone

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Other potential sources include: Centre for Reviews and Dissemination and CDC

Animals other than mammals

Why does this article say "In humans and other mammals" when referring to the production of testosterone? Birds, reptiles, amphibians, fish... Lots of animals produce testosterone in their testes, not just mammals. MeegsC (talk) 15:59, 22 November 2016 (UTC)[reply]

One needs to distinguish between producing the testosterone and using testosterone as a hormone (see for example PMID 11331759). Fish apparently don't produce/use testosterone, but rather 11-ketotestosterone (see Testosterone#Other_animals). It is not true that all animals (e.g., fish) use testosterone as a hormone. I have not been able to locate a source that discusses testosterone species distribution in depth, but I am reasonably certain that most if not all mammals use testosterone as the male sex hormone. Many but not all vertebrates produce/use testosterone as the male sex hormone. Hence it is safer to state "In humans and other mammals" than "In humans and other animals". We need a better source that discusses the species distribution and if you can find one, that would be great. Boghog (talk) 18:15, 22 November 2016 (UTC)[reply]

Okay, forget fish. Certainly all birds (male and female) produce testosterone. Here are some links; I can certainly find more:

If not all vertebrates, how would you word it? Most vertebrates? Mammals and birds? Boghog (talk) 13:52, 23 November 2016 (UTC)[reply]

OK, I found two reviews (PMID 17931674, 19456336) that state that testosterone and the androgen receptor first appeared in gnathostomes (jawed vertebrates). Agnathans (jawless vertebrates) such as lampreys don't tproduce testosterone but instead appear to use androstenedione as a male sex hormone. Boghog (talk) 05:46, 24 November 2016 (UTC)[reply]

Fixed (I hope) in these edits. As always, please feel free to edit further. Cheers. Boghog (talk) 17:22, 24 November 2016 (UTC)[reply]

Thanks Boghog! MeegsC (talk) 12:54, 26 November 2016 (UTC)[reply]

Units for levels

Section Biochemistry: Levels gives typical levels only in units of ng/dL. In most countries afaik the commonest unit is nmol/dL (nanomoles/deciLitre) or similar; a typical lab report I have seen from Canada has only nmol/dL and does not give a conversion factor. The equivalent ranges should be included here, as is common in other WP medical articles. Note that because nmol/dL is a parametric unit there is no general conversion (like metres to feet), so each article/substance requires explicit conversion. D Anthony Patriarche (talk) 02:38, 14 August 2024 (UTC)[reply]