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Testosterone key to new bird bang theory

New research from a Wake Forest University biologist who studies animal behavior suggests that evolution is hard at work when it comes to the acrobatic courtship dances of a tropical bird species.

It's a girl: Gene silencing technology alters sex of prawns

Israeli scientists have developed a novel method for generating single-sex populations of prawns. This could be used to boost the productivity of aquaculture farms and even as a biocontrol measure against invasive species ...

Brain steroids make good dads

Testosterone in males is generally associated with aggression and definitely not with good parenting. Insights from a highly social fish can help understand how other androgenic steroids, like testosterone, can shape a male's ...

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Androgen

Androgen, also called androgenic hormone or testoid, is the generic term for any natural or synthetic compound, usually a steroid hormone, that stimulates or controls the development and maintenance of male characteristics in vertebrates by binding to androgen receptors. This includes the activity of the accessory male sex organs and development of male secondary sex characteristics. Androgens were first discovered in 1936. Androgens are also the original anabolic steroids and the precursor of all estrogens, the female sex hormones. The primary and most well-known androgen is testosterone, other less important androgens are dihydrotestosterone and androstenedione.

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