While two thirds of the states in the U.S. have adopted one version or another of the Uniform Parentage Act, which is designed to protect sperm donors from being forced to assume any parenting responsibilities, it is not the case in all states. In 2007, a court of law in Pennsylvania ruled that there would be three adults financially responsible to support two minors: the sperm donor, the mother and the woman the mother had married based on the Civil Union Act.
This unprecedented ruling caused a lot of debate, since law experts showed that the state law stated quite clearly that only two adults could be liable for child support. The court had based its decision on the fact that the sperm donor had been somewhat involved in the children’s life. The man died during the trial.