Stressful events in prenatal life of bi- and homosexual men

Mothers of male homosexuals, bisexuals and heterosexuals were to recall stressful episodes they may have experienced during pregnancy (e.g. deaths of close relatives, divorces, separations, traumatic, financial or sexual experiences, feelings of severe anxiety). Nearly two-thirds of the mothers of the male homosexuals, compared to one-third of the mothers of the bisexuals and less than 10% of the mothers of the heterosexuals were able to recall such episodes.