Rep. Bart Stupak (D-Mich.) canceled a planned press conference Saturday morning on abortion, fueling speculation about whether new abortion restrictions would be added to the healthcare bill.

Stupak's office confirmed that the Michigan centrist, who opposes abortion rights, would cancel an 11 a.m. press availability in which he was expected to discuss his efforts to append restrictions to the healthcare bill before the House that would have curtailed the extent to which federal funds could subsidize the purchase of insurance plans which cover abortion.

Stupak had been meeting with House Speaker Nancy Pelosi (D-Calif.) on Friday night to discuss adding those amendments, sending a signal that the speaker may need to rely on anti-abortion rights Democrats to pass a bill. Members of the Congressional Pro-Choice Caucus expressed strong dissatisfaction with a potential agreement.

It's not clear what Stupak's cancellation on Saturday means, be it an agreement or breakdown with Democratic leadership. His office said that information regarding rescheduling of the press conference had not yet been determined.