Scientific developments in surrogacy are particularly important to lesbian couples because they could lead to changes in legal rights that so often affect them.

Case in point: a new development pointed out by California family lawyer Theresa Erickson, written about in a New York Times article on the developing science of surrogacy. The article talks about how scientific developments are making it possible for a child to have more than one biological parent. Defective DNA of a pregnant woman can be replaced with DNA from another woman, giving a child 2 biological moms.

This creates problems because state laws are set up with the assumption that a child can only have two biological parents. While a handful of cases have recently recognized the legal possibility of three parents, such as a Pennsylvania decision that made three adults pay child support, most states, including Georgia, have no such cases.

Theresa does note that the article makes a good suggestion for how the law can cope with these scientific advances:

Parenthood cannot be reduced to a formula, but the law should move toward a greater recognition that the intent of the people involved is more important than the genes. That would provide useful guidance for courts to think about fractional parents — especially if the day comes when three or more people want to combine their DNA to create a baby.

In other words, parental rights should be based on who take care of a child, not who's biologically related. I'm not sure if this is a good solution, because often in child custody cases more than two adults have helped take care of the child. Certainly, it should be a factor, but I don't think it's necessarily a better system than biological relatedness.

On the other hand, if the law does move to place more weight on who takes care of a child when deciding parental rights, that may make more rare situations where rights are given to sperm donors solely because they're biologically related to the child.

[Cross-posted at the Gay Couples Law Blog. Published by Gideon Alper, who also publishes the Atlanta Divorce Law Blog, it discusses same sex family law, estate planning, and taxes.]