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  2. Organizational-Activational Hypothesis - Wikipedia

    en.wikipedia.org/wiki/Organizational-Activation...

    The Organizational-Activational Hypothesis states that steroid hormones permanently organize the nervous system during early development, which is reflected in adult male or female typical behaviors. [1] In adulthood, the same steroid hormones activate, modulate, and inhibit these behaviors.

  3. Environment and sexual orientation - Wikipedia

    en.wikipedia.org/wiki/Environment_and_sexual...

    The influence of hormones on the developing fetus has been the most influential causal hypothesis of the development of sexual orientation. [6] [17] In simple terms, the developing fetal brain begins in a "female" typical state. The presence of the Y-chromosome in males prompts the development of testes, which release testosterone, the primary ...

  4. Biology and sexual orientation - Wikipedia

    en.wikipedia.org/wiki/Biology_and_sexual_orientation

    The influence of hormones on the developing fetus has been the most influential causal hypothesis of the development of sexual orientation. [ 3 ] [ 5 ] In simple terms, the developing fetal brain begins in a "female" state.

  5. New study finds that brain structure changes cyclically ... - AOL

    www.aol.com/study-finds-brain-structure-changes...

    What has been observed is that white matter changes across hormonal transition phases like puberty, taking birth control, menopausal treatment, and gender transition treatment — however, ...

  6. Ovulatory shift hypothesis - Wikipedia

    en.wikipedia.org/wiki/Ovulatory_shift_hypothesis

    The hypothesis separately proposes that hormonal changes across the cycle cause women, when they are most likely to get pregnant, to be more attracted to traits in potential short-term male sexual partners that indicate high genetic quality, leading to greater reproductive success. [3]

  7. Prenatal hormones and sexual orientation - Wikipedia

    en.wikipedia.org/wiki/Prenatal_hormones_and...

    The hormonal theory of sexuality holds that, just as exposure to certain hormones plays a role in fetal sex differentiation, such exposure also influences the sexual orientation that emerges later in the adult. Differences in brain structure that come about from chemical messengers and genes interacting on developing brain cells are believed to ...

  8. What are the signs you need hormone replacement therapy ... - AOL

    www.aol.com/signs-hormone-replacement-therapy...

    Hormone replacement therapy could be a major key to unlocking health benefits for women going through menopause, according to new research.. A study published Aug. 29 in the journal JAMA Network ...

  9. Challenge hypothesis - Wikipedia

    en.wikipedia.org/wiki/Challenge_hypothesis

    However, the dual-hormone hypothesis also has its own flaws, and current evidence appears to only partially support the hypothesis, according to a meta-analytical evaluation in 2019 by Dekkers et al. [36] A proposed reasoning for the occasional weak evidence is that cortisol and testosterone, further interact with social context and individual ...