Prosecutors contend those second opinions were not legal because the two Kansas doctors had legal and financial ties.
However, Sedgwick County District Judge Clark Owens on Thursday said jurors will only be considering whether the doctors had financial ties.
But he did reject another defense request for acquittal.
Tiller is on trial in Sedgwick County District Court on 19 misdemeanor charges stemming from some abortions he performed at his Wichita clinic in 2003.
After the defense rested Thursday, jurors were sent home while attorneys hashed out jury instructions and other issues.
Closing arguments are scheduled for Friday.
(Copyright 2009 by The Associated Press. All Rights Reserved.)