In a revelation Tuesday that Planned Parenthood Advocates in Missouri described as “deeply disturbing,” the state health director Dr. Randall Williams testified at an administrative commission hearing that he kept a spreadsheet to track Planned Parenthood patients’ menstrual periods.

Williams’ testimony came as part of a contentious legal battle over the Missouri Health Department’s refusal to renew the license for Planned Parenthood’s clinic in St. Louis, which is the state’s last remaining abortion care provider.

The Kansas City Star reported that Williams, an OB-GYN appointed to his position in 2017, “said the spreadsheet was made at his request by the state’s main investigator to identify patients who had undergone failed abortions.”

According to the newspaper:

Responding to Williams’ testimony in a series of tweets Tuesday, Planned Parenthood Advocates in Missouri declared that “Missouri politicians have gone too far. Tracking patients’ periods is government overreach at its worst and a major violation of privacy.”