A federal judge, saying the trial was taking too long, declared a mistrial Tuesday in a woman's lawsuit against G.D. Searle & Co. that charges the pharmaceutical firm's Cu-7 intrauterine contraceptive device caused an infection that left her sterile.

After U.S. District Judge Irving Hill ended the nine-day trial, the case was reassigned to Judge Mariana Pfaelzer. Attorneys could not predict when the retrial would begin.Michael Ciresi, a Minneapolis-based attorney representing the woman, said Hill was concerned the trial would run beyond the estimate of six to eight weeks and would interfere with his scheduled vacation in March.