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Does a chemical imbalance cause homosexuality

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The hormonal theory of sexuality holds that, just as exposure to certain hormones plays a role in fetal sex differentiationsuch exposure also influences the sexual orientation that emerges later in the adult.

The hormonal theory of sexuality and gender identity holds that, just as exposure to certain hormones plays a role in fetal sex differentiation, such exposure also influences the sexual orientation and or gender identity 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 be the basis of sex differences in countless behaviors, including sexual orientation.

As seen in young children as well as in vervet and rhesus monkeys, sexually differentiated behavior in toy preference is differing in males versus females, where females prefer dolls and males prefer toy balls and cars; these preferences can be seen as early as 3—8 months in humans.

An endocrinology study by Garcia-Falgueras and Swaab postulated that "In humans, the main mechanism responsible of [ sic ] sexual identity and orientation involves a direct effect of testosterone on the developing brain. Sketching the argument briefly here, the authors say that sexual organs are differentiated first, and then the brain is sexually differentiated "under the influence, mainly, of sex hormones such as testosterone, estrogen and progesterone on the developing brain cells and under the presence of different genes as well The changes brought about in this stage are permanent.

Fetal gonads develop primarily based on the presence or absence of androgen hormones, mainly testosteronedihydrotestosterone DHT and androstenedione ; production of testosterone and conversion into dihydrotestosterone during weeks 6 to 12 of pregnancy are key factors in the production of a male fetus's penis, scrotum and prostate. Most extensively studied in organizational effects of hormones is congenital adrenal hyperplasia CAH.

Girls with CAH are born with Does a chemical imbalance cause homosexuality genitalia, which is corrected surgically as soon as possible. However, "CAH is not a perfect experiment", since, "social responses to masculinized genitalia or factors related to the disease itself" can confound results. Since hormones alone do not determine sexual orientation and differentiation of the brain, the search for other factors that act upon sexual orientation have led genes such as the SRY Does a chemical imbalance cause homosexuality ZFY to be implicated.

As of results from studies in humans had found conflicting evidence regarding the effect of prenatal exposure to hormones and psychosexual outcomes; Gooren noted in that studies in subprimate mammals are invalid measures of human sexual differentiation, as sex hormones follow a more "on-off" role in sex-typed behavior than is found in primates.

Some studies do "Does a chemical imbalance cause homosexuality" that prenatal stress significantly increases the likelihood of homosexuality or bisexualityalthough varying evidence exists for which trimester is most important. Some have postulated that postnatal e. Children born through artificial insemination with donor sperm and consequently raised by lesbian couples have typically been heterosexually oriented.

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