DES MOINES, Iowa — An Iowa judge agreed Friday to temporarily block the most restrictive abortion law in the country under an agreement between the state and abortion rights groups. Attorneys for the state and Republican Gov. Kim Reynolds told the judge they agreed to prevent the law from taking effect on July 1 after discussions with three groups challenging the law: the American Civil Liberties Union of Iowa, Planned Parenthood Federation of American and the Emma Goldman Clinic. The groups are suing the state, arguing that the law – which bans most abortions if a fetal heartbeat can be detected – is unconstitutional.