Perioperative Hemoglobin Decline After Deep Endometriosis Surgery: Association with Surgery Duration and Exploratory Analyses of Operative Extent

Background/Objectives: Deep endometriosis surgery may require bowel and multiorgan procedures, but reported blood loss and complications do not fully characterize postoperative hemoglobin decline, a relevant consideration for patient blood management. We aimed to quantify the frequency of a hemoglobin decline of ≥3 g/dL and its association with surgery duration, with secondary exploratory analyses of operative extent.