Davis and Abbott are now running against each other to replace Perry, who is not seeking another term.
Miller said part of the problem was finding doctors with admitting privileges to work with her clinics because of threats or intimidation by anti-abortion groups. Whole Woman's Health also operates clinics in Austin, San Antonio, Fort Worth and two outside of Texas.
"These medical professionals who know us and our work could have helped us keep our clinics open, yet they have remained silent," she said. "We ask those doctors who would not step up for us: Where will you send your patients now?"
Follow Chris Tomlinson on Twitter at http://twitter.com/cltomlinson .