James Margolin, a spokesman for the United States attorney’s office in Manhattan, declined to comment other than to say that Ms. Misir’s characterization of the prosecutors’ behavior was “factually inaccurate.”

In the Oct. 16 letter to the judge, Ms. Misir wrote, “Because of my medical history and health conditions that have developed with the pregnancy, my doctors have ordered me to substantially reduce my workload, and to restrict travel and activity during the remainder of my pregnancy.”

In an Oct. 20 letter to the judge opposing the request, prosecutors wrote that the case had been long pending; that Ms. Misir had agreed previously to the January date; and that she had a “highly experienced and able” co-counsel. The government also cited Mr. Tabone’s right to a speedy trial, adding, “The court should not countenance further delay of the trial.”

Ms. Misir wrote again, on Oct. 30, asking that a pretrial conference be postponed because she had a long-planned trip to Washington to address a lawyers’ conference. Judge Karas then issued an order noting her decision to travel “despite the fact that in her request for an adjournment” of the trial she said that she had to restrict her travel.

The judge also admonished Ms. Misir for what he called her “ex parte communications” with his chambers. Judge Karas said Ms. Misir had called his chambers and had spoken to a law clerk for about 10 minutes about the scheduling of the pretrial conference and expressing criticism of the prosecutors.

Ms. Misir, in her letter on Wednesday, said she had called to resolve multiple scheduling and procedural issues; denied communicating on the “merits” of the case; and said “the frustration” she expressed stemmed from her condition and what she saw as the prosecutors’ behavior toward her “at a medically delicate time.”

She wrote that she had worked as a Justice Department lawyer, as an ethics lawyer in the White House and as a deputy assistant secretary of labor for policy.