In an article in today's Baltimore Sun, MacMillan notes "Every major children's health and welfare organization, including the American Academy of Pediatrics, the Child Welfare League of America, the American Psychological Association, the American Psychiatric Association, the National Association of Social Workers, and the American Academy of Child and Adolescent Psychiatry, confirms that gay parents make good parents. The American Medical Association, the nation's largest and most well respected association of physicians, with a membership of more than 200,000, agrees". Studies purporting to show that LBG parents are flawed have been completely debunked for their pseudo-scientific methodologies.
There is currently no research specifically about trans parents.