How Hormones Shape Sexual Development

Professor of Neurobiology and Ophthalmology at Stanford School of Medicine and host of the Huberman Lab Podcast, where he discusses science and science-based tools.

Co-author of the textbook 'Behavioral Endocrinology', an expert in the field.

A Harvard researcher whose work, among others, has contributed to understanding the speed of entry and exit from puberty as a potential indicator of an individual's developmental and aging trajectory.

A researcher who, along with Steve Glickman, conducted careful research on hyenas to understand the mechanisms behind their unique sexual characteristics.

A neuroscientist who trained under Hubel and Wiesel at UCLA and discovered a brain difference in homosexual individuals in an area called the Interstitial Nucleus of the Anterior Hypothalamus (INAH).

A researcher, likely at UT Austin at the time, who studied the auditory system and discovered sex differences in autoacoustic emissions, pointing to biological variations independent of sex or social behavior.

A colleague of Andrew Huberman at Stanford School of Medicine, whose research highlights estrogen's role in establishing masculine sexual and territorial behaviors.

A phenomenal scientist and professor at UC Berkeley who studied spotted hyenas and their unique genital structure, discovering the role of androstenedione in female masculinization.

A researcher at UC Berkeley whose work identified the impact of environmental toxins like atrazine on developmental defects in frogs and their hormone systems.

A scientist at UC Berkeley who studies sexual dimorphism in the nervous system and directed research on finger length ratios as an indicator of in utero androgen exposure and its potential link to sexual preference.

Co-author of the textbook 'Behavioral Endocrinology', an expert in the field.

A behavioral and animal expert and graduate student at UC Berkeley who studied a species of mole capable of transdifferentiating its testes into ovaries.

A vitamin supplement bundle offered with Athletic Greens, important for various aspects of brain and body health.

A sports supplement that can increase water in muscles, support strength, and potentially have mild cognitive benefits. It can promote 5-alpha-reductase activity, increasing DHT and leading to hair loss and beard growth in some individuals.

The primary psychoactive compound in cannabis, which, along with other elements in the plant, promotes significant increases in aromatase activity, potentially leading to increased estrogenic outcomes.

A natural substance that structurally resembles testosterone, though its bioavailability in humans is not entirely clear.

A substance found in many beauty products that contains estrogenic compounds and can promote estrogenic pathways in the body, potentially affecting sexual development in children through skin contact.

The development of male breast tissue, often caused by increased estrogen levels resulting from the conversion of testosterone via aromatase, seen during puberty or with exogenous androgen use.

A gene on the Y chromosome that promotes the formation of testes.

A substance found in many herbicides and waterways that causes severe testicular malformations and contributes to declining sperm counts in animals and potentially humans.

A specific brain region where Simon LeVay discovered structural differences in individuals who self-report as homosexual.

A form of meditation or deep relaxation that NSDR bears resemblance to, which Andrew Huberman practices daily.

A hormone encoded by a gene on the Y chromosome that inhibits the formation of Müllerian Ducts, which develop into female reproductive organs.

A medical treatment often involving creams, for which caution is advised regarding skin contact with others, particularly children, to avoid unwanted hormonal effects.

Genetic tests that can estimate an individual's rate of aging.

A free relaxation protocol developed by Madefor, similar to yoga nidra but stripped of esoteric language, designed to bring deep relaxation through breathing and body scan.

A rare genetic condition, first identified in the Dominican Republic, where individuals with XY chromosomes and a lack of 5-alpha-reductase appear female at birth but develop a penis during puberty.

A fungicide and anti-androgen that, when given to animals like rats, prevents penis formation.

Sounds produced by the inner ear itself, which exhibit sex differences and were found to be more common in young males and self-reported lesbians, suggesting biological correlates independent of sexual or social behavior.

Performance-enhancing drugs that act on androgen receptors, currently a topic of much interest in sports performance augmentation.

A cannabis-derived substance with estrogenic properties due to increased aromatase activity; smoking it during pregnancy can shift fetal hormone patterns towards more estrogenic outcomes.

A paper published in the journal 'Clinical Biochemistry' that investigated the effects of radio frequency radiation (RFR) from cell phones on human hormone profiles, showing significant decreases in cortisol, thyroid hormones, prolactin in females, and testosterone in both sexes.

A park behind the UC Berkeley campus where Steve Glickman maintained a colony of spotted hyenas and where a species of mole capable of sex change lived.

An application developed by Yale University researchers for tracking emotions, which faced temporary unavailability but is now back online.

The organization that provides the free NSDR protocol as a resource for deep relaxation.

A renowned medical institution that partners with Thorne, underscoring the supplement company's credibility and quality standards.

The institution where Andrew Huberman is a professor of Neurobiology and Ophthalmology.

The university where Tyrone Hayes conducts research on environmental toxins and where Andrew Huberman was a graduate student.

A prestigious scientific journal that published Simon LeVay's discovery of brain differences in the INAH of homosexual individuals.

A highly esteemed scientific journal where the research on finger length ratios, and its correlation with in-utero androgen exposure, was published in 2000 and subsequently replicated.

Institution where the Mood Meter App was developed by experts studying the biology and psychology of emotions.

A prominent scientific journal that featured a cover article about Steve Glickman's important discovery regarding hyenas.

A scientific journal where Steve Glickman and colleagues published their initial hypothesis about androstenedione in hyenas in 1987.

A genetic mutation in XY individuals where testosterone is produced but the receptors are mutated, leading to a female external phenotype, undescended testes, and inability to menstruate or conceive.

A well-established negative outcome of drinking during pregnancy, leading to cognitive defects and physical malformations.

A personalized nutrition platform that analyzes blood and DNA data to help individuals understand their body and reach health goals by providing directives on food and exercise.

An all-in-one vitamin, mineral, and probiotic drink that Andrew Huberman has been using since 2012, providing essential nutrients and supporting gut health.

A company that makes mattresses and pillows designed to optimize sleep based on individual sleep needs determined by a two-minute quiz.

A supplement brand partnered with the Huberman Lab Podcast, known for its high stringency in ingredient quality and precise amounts, trusted by institutions like the Mayo Clinic and major sports teams.

A specific mattress from Helix Sleep that Andrew Huberman matched with after taking their sleep quiz and has been using successfully for many months.