SUMMARY
The small and nonrepresentative samples studied and the relatively young age of most of the children suggest some reserve. However, the weight of evidence gathered during several decades using diverse samples and methodologies is persuasive in demonstrating that there is no systematic difference between gay and nongay parents in emotional health, parenting skills, and attitudes toward parenting. No data have pointed to any risk to children as a result of growing up in a family with 1 or more gay parents. Some among the vast variety of family forms, histories, and relationships may prove more conducive to healthy psychosexual and emotional development than others.
Research exploring the diversity of parental relationships among gay and lesbian parents is just beginning. Children whose parents divorce (regardless of sexual orientation) are better adjusted when their parents have high self-esteem, maintain a responsible and amicable relationship, and are currently living with a partner.22,31 Children living with divorced lesbian mothers have better outcomes when they learn about their mother's homosexuality at a younger age, when their fathers and other important adults accept their mother's lesbian identity, and perhaps when they have contact with other children of lesbians and gay men.22,24 Parents and children have better outcomes when the daunting tasks of parenting are shared, and children seem to benefit from arrangements in which lesbian parents divide child care and other household tasks in an egalitarian manner28 as well as when conflict between partners is low. Although gay and lesbian parents may not, despite their best efforts, be able to protect their children fully from the effects of stigmatization and discrimination, parents' sexual orientation is not a variable that, in itself, predicts their ability to provide a home environment that supports children's development.
That's the summary of
http://www.aap.org/policy/020008t.html
Which is the special report made to the American Assocation of Pediatrics.