You can read the story about the initial lawsuit below:
https://www.lifesitenews.com/news/planned-parenthood-aclu-sue-iowa-over-law-stopping-abortions-on-babies-with
You can read the follow up about the Iowa AG refusing to defend against the suit:
https://patch.com/iowa/des-moines/iowa-fetal-heartbeat-law-challenged-ag-won-t-defend-state