Some research indicates that the likelihood of being homosexual for a man is related to

Name: Some research indicates that the likelihood of being homosexual for a man is related to
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Research has shown that the more older brothers a man has, the more likely he is to be homosexual. This is known as the fraternal birth order effect. The reason for this correlation is not fully understood, but it is thought to be related to changes in the mother's immune system during pregnancy.

Some Research Indicates That the Likelihood of Being Homosexual for a Man