O.K., emiliano wants to know about sexual preference of the children of lesbian and gay parents, and I aim to serve:
Allen, M., & Burrell, N. (1996). Comparing the impact of homosexual and heterosexual parents on children: Meta-analysis of existing research. Journal of Homosexuality, 32, 19-35.
This meta-analysis summarizes the available quantitative literature comparing the impact of heterosexual and homosexual parents, using a variety of measures, on the child(ren). The analyses examine parenting practices, the emotional well-being of the child, and the sexual orientation of the child. The results demonstrate no differences on any measures between the heterosexual and homosexual parents regarding parenting styles, emotional adjustment, and sexual orientation of the child(ren).
Anderssen, N., Amlie, C., & Ytteroy, E. A. (2002). Outcomes for children with lesbian or gay parents: A review of studies from 1978 to 2000. Scandinavian Journal of Psychology, 43, 335-351.
Reviewed 23 empirical studies published between 1978 and 2000 on nonclinical children raised by lesbian mothers or gay fathers (one Belgian/Dutch, one Danish, three British, and 18 North American). Twenty studies reported on offspring of lesbian mothers, and three on offspring of gay fathers. The studies encompassed a total of 615 offspring (age range 1.5-44 yrs.) of lesbian mothers or gay fathers and 387 controls, who were assessed by psychological tests, questionnaires, or interviews. Seven types of outcomes were found to be typical: emotional functioning, sexual preference, stigmatization, gender role behavior, behavioral adjustment, gender identity, and cognitive functioning. Children raised by lesbian mothers or gay fathers did not systematically differ from other children on any of the outcomes. The studies indicate that children raised by lesbian women do not experience adverse outcomes compared with other children. The same holds for children raised by gay men, but more studies should be done.
Gottman, J. S. (1990). Children of gay and lesbian parents. In F. W. Bozett & M. B. Sussman (Eds.), Homosexuality and family relations (pp. 177-196). New York: Harrington Park Press.
Reviews research literature on children of homosexual (HS) parents, including comparisons with children of heterosexual parents. Children of HS parents did not appear deviant in gender identity, sexual orientation, or social adjustment. Issues that emerged during their upbringing related more to society's rejection of homosexuality than to poor parent-child relationships.