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WHO OWNS CHRISTIAN MINGLE H-Y antigen is a male tissue specific antigen. There are several antigens which qualify as H-Y as defined by rejection...

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It has been hypothesized that this fraternal birth order effect reflects the progressive immunization of some mothers to Y-linked minor histocompatibility antigens H-Y antigens by each succeeding male fetus and the concomitantly increasing effects of such maternal immunization on the future sexual orientation of each succeeding male fetus.

According to this hypothesis, anti-H-Y antibodies produced by the mother pass through the placental barrier to the fetus and affect aspects of sexual differentiation in the fetal brain. This explanation is consistent with a variety of evidence, including the apparent irrelevance of older sisters to the sexual orientation of later born males, the probable involvement of H-Y antigen in the development of sex-typical traits, and the detrimental effects of immunization of female mice to H-Y antigen on the reproductive performance of subsequent male offspring.

The maternal immune hypothesis might also explain the recent finding that heterosexual males with older brothers weigh less at birth than heterosexual males with older sisters and homosexual males with older brothers weigh even less than heterosexual males with older brothers.

Copyright Academic Press.

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Papers written by students providing well-organized reviews of topics related to health and well being. An Inquiry of the Maternal Unaffected Hypothesis. Homosexuality has been an observable human behavior since archaic times. Researchers debate whether sex orientation can be primarily attributed to genetic or environmental circumstances, or a combination of both.

In males, fraternal birth degree is actually the best predictor of sexual orientation Bogaret Two major observations underlie the fraternal birth order effect. The first is the observation that, typically, homosexual males have more older brothers than heterosexual males Blanchard The fraternal descent order effect identifies the prenatal environment as a determinant for the sake of male sexual orientation. This gazette is an inquiry of the maternal immune hypothesis.

It intends to explain the maternal untouched hypothesis and its relation to the fraternal birth order make, while also explaining the friendly birth order effect and its relation to male sexual preparation. More simply, it questions if, and to what extent, prenatal circumstances, particularly fraternal birth up, affect sexual orientation in males.

The Maternal Immune Hypothesis.

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H-Y antigen and homosexuality...

A third example is MEA1. It is also true, however, that there exist more homosexual males than the fraternal birth order effect can account for Whitehead It is the sum of attributable fractions for gay men with n older brothers weighted by the proportions of gay men who have n older brothers Blanchard Additionally, this study is compatible with the H-Y antigen theory and the maternal immune hypothesis, as it exhibits that sexual orientation may be the result of brain dimorphism of the sexes.

Whitehead in his examination of the maternal immune hypothesis, approaches with great speculation the theory that homosexuality can be attributed to the maternal immune hypothesis.

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Hy antigen homosexuality statistics

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How do you know you won't hear from him/her again? weight; homosexuality; anti-H-Y antibodies; H-Y antigen; maternal immune hy- . Let us assume that the prevalence of homosexuality in men with no older. The largest of these effects, using statistical effect size estimates the supply of antibodies to NLGN4Y even in the absence of antigen re-exposure .. () HY immune tolerance is common in women without male offspring..

Fraternal birth order and the maternal immune hypothesis of male homosexuality.

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