Children of same-sex parents are doing as well or better than the rest of the population on a number of key health indicators.
That is the initial finding from the world's largest study on the children of same-sex parents, under way at Melbourne University.
The Australian Study of Child Health in Same-Sex Families collected data on 500 children nationwide, up to the age of 17. Of the 315 gay, lesbian and bisexual parents who completed the globally-recognised Child Health Questionnaire, 80 per cent were women.
An interim report found there was no statistical difference between children of same-sex couples and the rest of the population on indicators including self-esteem, emotional behaviour, and the amount of time spent with parents.

However, children of same-sex couples scored higher than the national average for overall health and family cohesion, measuring how well the family get along.
Researchers said the difference between the two groups on these measures was so strong it would only occur by chance less than 1 in 10,000 times.
Former prime minister Kevin Rudd said the wellbeing of children had been "the sole remaining obstacle" to him supporting same-sex marriage, which he announced in a blog post last month.
Federal parliament was to vote this week on Greens MP Adam Bandt's private members bill to legalise same-sex marriage. However, a vote is now unlikely before the election to allow more time for debate.
Mr Bandt said his bill had already been through a wide-ranging parliamentary inquiry and debated on four separate occasions.
"It's time now for a vote so that as we go to this election, people know where their local MP stands," Mr Bandt said.
In his blog post on May 20, Mr Rudd referred to a number of American studies that found "same-sex families do not compromise children's development".
"Finally, as someone who was raised for the most important part of his childhood by a single mum, I don't buy the argument that I was somehow developmentally challenged because I didn't happen to have a father," Mr Rudd wrote. "The loving nurture of children is a more complex business than that."
The lead researcher on the Melbourne University study, Dr Simon Crouch, said he and his colleagues were yet to determine why children from same-sex families performed better on measures such as family cohesion.
"Because of the situation that same-sex families find themselves in, they are generally more willing to communicate and approach the issues that any child may face at school, like teasing or bullying," Dr Crouch said. "This fosters openness and means children tend to be more resilient. That would be our hypothesis."
The study will also look at whether there is a correlation between the wellbeing of children, and the discrimination their family may experience in schools, childcare, healthcare services and the media.
"This can range from poorly informed comments to teasing, bullying, overt homophobia and rejection," Dr Crouch said.
The majority of same-sex couples are now having children through assisted reproductive technology, while 10 years ago Dr Crouch said most children came from a previous heterosexual relationship.
At the 2011 Census, there were 6120 children under 25 in same-sex couple families. However, Dr Crouch said due to under-reporting, the true figure could be more than double that.
The full results from the study are expected in September 2013.