Birth order influences sexual trend
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Two gays held each other in the parade at Lisbon , 24/6
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If you are the youngest son in the family with many brothers, you may possibly be gay. This origins from your mother, not from the social influence.
The scientists found that when your mother delivered your older brother, your risk of gay was up to 30%. This effect has been considered to come from society rather than from biology before.
Some explained that outrageous games and wrestling among brothers even sexual abuse made these boys haunted and become gays.
Now Anthony Bogart in Brock University in St Catharines , Canada left out the above assumption. He checked 944 gays, normal men, gays living with half-brothers on their fathers' side.
The result figured out that the quantity of half-brothers on their mothers' side influenced sexual trend in male. This was also true even when the half-brothers on mothers' side lived separately.
The scientists explained that mothers' immune system decoded and recorded male fetuses as strange subjects, which created antibodies to resist. These antibodies continued to influence their brains to determine children sex.
Female fetuses were not influenced because mothers themselves were female. Therefore, no antibody was created during expectance.
Other assumptions believed that age and stress level of mothers during expectance influenced sexual trend in male.
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