INDIANAPOLIS — Planned Parenthood of Indiana and Kentucky sued Indiana officials Thursday over a new law that makes it tougher for girls under age 18 to get an abortion without their parents’ knowledge, saying it creates ‘‘an unconstitutional undue burden on unemancipated minors.’’

The federal lawsuit filed by Planned Parenthood and the American Civil Liberties Union of Indiana seeks an injunction blocking some of the law’s measures from taking effect July 1. The complaint contends those portions violate the US Constitution’s due process and equal protection provisions, and the First Amendment.

Under existing Indiana law, girls younger than 18 must either get their parents’ consent to have an abortion or seek permission from a judge. But the new law would require the judge considering that request to also weigh whether the girl’s parents should receive notification of her pursuit of the so-called ‘‘judicial bypass,’’ regardless of the decision on the abortion itself. Governor Eric Holcomb, who signed the law April 25, has called the measure a ‘‘parental rights issue.’’

Betty Cockrum, the CEO and president of Planned Parenthood of Indiana and Kentucky, said portions of the new law ‘‘will have a chilling effect on teenagers already dealing with a difficult situation.’’

‘‘We encourage teenagers to have open and honest conversations with their family members, but unfortunately not every teenager is in an environment where that is safe,’’ Cockrum said.

Associated Press