In Massachusetts, petitions for the removal or relocation of a child from the Commonwealth are evaluated under one of two legal analyses, depending on whether one parent has sole/primary custody or the parents share physical custody. Where one parent has primary physical custody of the child(ren) a judge will determine whether there is cause shown to permit relocation by applying the "real advantage" analysis first set forth in the case of Yannas v. Frondistou-Yannas.The interests of the custodial parent weigh heavily in the real advantage test, as a custodial parent will be permitted to relocate if the move offers a genuine, recognizable advantage to that parent and is consistent with the child's best interests.