MADISON, Wis. — The Wisconsin Supreme Court has decided to hear a challenge to the state's domestic partner registry.

The registry grants same-sex couples a host of legal rights. Members of the conservative group Wisconsin Family Action filed a lawsuit in 2010 alleging the registry violates a 2006 state constitutional amendment prohibiting gay marriage or anything substantially similar.

The 4th District Court of Appeals in December upheld the registry, listing a number of rights married couples enjoy that same-sex couples don't even if they join the registry.

The Supreme Court's spokesman issued a statement Friday saying the court would take the case. The statement didn't include any explanation why. It's unclear when the court might hear arguments or render a decision.