TOPEKA (AP) —A Kansas judge has ruled that a man who donated sperm to a lesbian couple after responding to their online ad is the father of a child born to the women and must pay child support.

Shawnee County District Court Judge Mary Mattivi wrote Wednesday that because a licensed physician was not involved in the artificial insemination process, William Marotta is more than a sperm donor and thus responsible for the child.

The Kansas Department for Children and Families filed the case in October 2012 seeking to have the Topeka man declared the father of a girl born to Jennifer Schreiner in 2009.

Marotta argued that he didn’t intend to be the child’s father and signed a contract waiving his parental rights.