According to recent research, a male may be at a greater likelihood to be homosexual if he has:

Question

Quizplus · Accepted Answer

Recent research suggests that having older brothers increases the likelihood of a male being homosexual due to the biological phenomenon called the fraternal birth order effect. This effect argues that a mother's immune response to male-specific antigens increases with each male pregnancy, making it more likely that the mother's immune system will produce antibodies that may interfere with the normal development of a male fetus's brain. This interference may contribute to a male child's sexual orientation, and it is most pronounced when there are multiple male pregnancies.

According to Recent Research, a Male May Be at a Greater