Understanding Abortion Pathology Reports: Accuracy & Viability

Question
When the lab sends out the tissue after an abortion, is the pathology report accurate for determining if the abortion was successful? Meaning that the pregnancy wasn't missed and cannot be viable any more?

Answer
When the doctor sends the tissue ( products of conception) to the lab, the Pathologists looks for the gestational sac and the lining that surrounds it.  The report says that the sac was identified. This reassures the doctor that performed the procedure that the pregnancy has been removed.