Debbie Clemens entered the courtroom in the waning minutes of Thursday's session and answered questions about her personal background and early relationship with her husband before court adjourned for the day.
She is expected to testify Friday that she received a shot of human growth hormone from Clemens' former strength coach, Brian McNamee, about a decade ago -- and that her husband was not present.
McNamee testified earlier in the trial that he gave Debbie Clemens a shot of HGH and that Roger Clemens was present.
One of the charges against Roger Clemens is that he lied when he told Congress that he didn't know that McNamee was injecting his wife.
