LGBT adoption is the adoption of children by lesbian, gay, bisexual and transgender (LGBT) persons. This may be in the form of a joint adoption by a same-sex couple, adoption by one partner of a same-sex couple of the other's biological child (step-child adoption) and adoption by a single LGBT person. Joint adoption by same-sex couples is legal in 25 countries and in some territories. Furthermore, 2 countries have legalized step-child adoption. Opponents of LGBT adoption question whether same-sex couples have the ability to be adequate parents (see LGBT parenting) while other opponents question whether natural law implies that children of adoption possess a natural right to be raised by heterosexual parents. Since constitutions and statutes usually fail to address the adoption rights of LGBT persons, judicial decisions often determine whether they can serve as parents either individually or as couples.
The existing body of research on outcomes for children with LGBT parents includes limited studies that consider the specific case of adoption. Moreover, where studies do mention adoption they often fail to distinguish between outcomes for unrelated children versus those in their original family or step-families, causing research on the more general case of LGBT parenting to be used to counter the claims of LGBT-adoption opponents. One study has addressed the question directly, evaluating the outcomes of adoptees less than 3-years old who had been placed in one of 56 lesbian and gay households since infancy. Despite the small sample, and the fact that the children have yet to become aware of their adoption status or the dynamics of gender development, the study found no significant associations between parental sexual orientation and child adjustment.
Adoption of children by LGBT people is an issue of active debate. In the United States, for example, legislation to stop the practice has been introduced in many jurisdictions; such efforts have largely been defeated. There is agreement between the debating parties, however, that the welfare of children alone should dictate policy. Supporters of LGBT adoption suggest that many children are in need of homes and claim that since parenting ability is unrelated to sexual orientation, the law should allow them to adopt children. Opponents, on the other hand, suggest that the alleged greater prevalence of depression, drug use, promiscuity and suicide among homosexuals (and alleged greater prevalence of domestic violence) might affect children or that the absence of male and female role models during a child's development could cause maladjustment.Catholic Answers, a Catholic religious group, in its 2004 report on gay marriage addressed parenting by homosexual partners via adoption or artificial insemination. It pointed to studies finding higher than average abuse rates among heterosexual stepparent families compared with same-sex parents. The American Psychological Association notes that an ongoing longitudinal study found that none of the lesbian mothers had abused their children. It states that fears of a heightened risk of sexual abuse by gay parents are not supported by research.