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    IF YOU COME FROM A LARGE FAMILY THE CHANCES ARE YOU MIGHT BE GAY

    IF YOU COME FROM A LARGE FAMILY THE CHANCES ARE YOU MIGHT BE GAY

    A correlation between fraternal birth order and male sexual orientation has been suggested by research. Ray Blanchard

    identified the association and referred to it as the fraternal birth order effect. In several studies, the observation is that the more older brothers a man has from the same mother, the greater the probability is that he will have a homosexual orientation. It has sometimes been called the older brother effect. It has been estimated that 15% of the homosexual demographic is associated with fraternal birth order.

    The fraternal birth order effect has been described by one of its proponents as "the most consistent biodemographic correlate of sexual orientation in men". In 1958, it was reported that homosexual men tend to have a greater number of older siblings (i.e., a 'later/higher birth order') than comparable heterosexual men and in 1962, these findings were published in detail. In 1996, Ray Blanchard and Anthony Bogaert demonstrated that the later birth order of homosexual men was solely due to a number of older brothers and not older sisters.

    Research over the years has established several facts. First, homosexual men do tend to have a higher birth order than heterosexual men, and this higher birth order is attributed to homosexual men having greater number of older brothers.