In oral arguments Monday, a panel of three judges for the Seventh Circuit Court of Appeals examined whether Indiana discriminates by not recognizing two married women both as parents on their children's birth certificates without having to adopt.

Judge Diane S. Sykes drew distinctions between biological parentage and parental rights, and which of the two should be represented on birth certificates.

"You can't overcome biology," Sykes said. "If the state defines parenthood by virtue of biology, no argument under the Equal Protection Clause or the substantive due process clause can overcome that."

"Your Honor, with all due respect, we maintain that parenthood is no longer defined by biology," said Karen Celestino-Horseman, the attorney for eight same-sex couples who brought the lawsuit against the state for only allowing only a mother and a father to be named on birth certificates. Read more via IndyStar