This from Parents Magazine January 2011 issue on page 29:
Children raised by two lesbian moms grow into psychologically healthy teens and have fewer behavioral problems than those born into a traditional family structure, according to recent research. "A possible reason for our findings is that the pairs of mothers shared parenting and household responsibilities. And even if moms separated, most couples continued to coparent," says study coauthor Nanette Gartrell, M.D., associate clinical professor of psychiatry at the University of California, San Francisco.
Hurray Lesbian Moms! And big kiddos to Parents Magazine for publishing this!