The ruling Wednesday is another court defeat for Texas over an anti-abortion law signed by Republican Gov. Greg Abbott last year. Judges haven't allowed efforts to mandate fetal remain burial or let Texas ban a common second-trimester abortion procedure.
U.S. District Judge David Ezra said the requirement would put "substantial obstacles" in the path of a women's right to an abortion. He had already issued a temporary injunction against the measure earlier this year.
Republican Texas Attorney General Ken Paxton called the ruling disappointing and said his office will continue to fight.