More birth seasonality data: As a follow-up to my post on GSS data and the connection of month of birth to a homosexual orientation, I looked at the The National Longitudinal Study of Adolescent Health. They have a larger sample of homosexuals--N = 226 (i.e, ever attracted to a male).
Percent born between August and November (bad months)
Straight boys 34.0
Gay and bisexual boys 34.9
Percent born between January and April (good months)
Straight boys 32.0
Gay and bisexual boys 32.7
No differences here, and a lack of empirical support for "gay germ theory." Keep in mind Agnostic's argument in the last set of comments that birth seasonality is simply not a good test of the theory.