i normally don’t cut and paste articles, but i found this one particularly interesting in the Wall Street Journal today (from Friday’s paper), especially since i have an older brother.
plus, any studies which support homosexuality being rooted in biology is alright by me.
Study finds biological link to male homosexuality
Friday, June 30, 2006
By Sharon Begley, The Wall Street Journal
A study released this week tracing some instances of male homosexuality to the “older brother effect” is more than another entrant in the race to find the biological roots of sexual orientation. The mechanism it points to fits with emerging research on the powerful effects of conditions in the womb.
The theory dates to 1996, when scientists reported an odd correlation. For each additional older brother that a boy has, his chance of growing up to be gay increases by one-third. The correlation doesn’t explain all homosexuality — many of the estimated 7 million gay men in the U.S. have no older brothers, and most younger brothers are straight. But if the conclusion is right, a rough calculation shows that “about 1 million American men are gay or will grow up to be gay because their mother had sons before them,” says psychologist S. Marc Breedlove of Michigan State University, East Lansing, who studies sexual orientation.
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