Dr. Kermit Gosnell is charged with first-degree murder in the deaths of four babies allegedly born alive.
He also faces a third-degree murder charge in the 2009 overdose death of a 41-year-old patient.
The 72-year-old Gosnell has been in custody since his arrest two years ago.
His lawyer argues that there were no live births at the clinic. The trial judge dismissed murder charges involving three other babies.
Jurors must also weigh more than 200 abortion law violations lodged against Gosnell. They started deliberations Tuesday after six weeks of evidence. They return on Thursday.
The panel has asked several questions about billing fraud charges against the only co-defendant, unlicensed doctor Eileen O'Neill of Phoenixville.