Study of Sacituzumab Govitecan Versus Treatment of Physician's Choice in Participants With Endometrial Cancer After Platinum-Based Chemotherapy and Immunotherapy (ASCENT-GYN-01/GOG-3104/ENGOT-en26)

The goal of this clinical study is to find out how the study drug, sacituzumab govitecan (SG) works in participants with endometrial cancer who have received prior treatment with platinum-based chemotherapy and immunotherapy, versus the treatment of physician's choice (TPC). The primary objectives of this study are to evaluate the effect of SG compared to TPC on progression-free survival (PFS) as assessed by blinded independent central review (BICR) and overall survival (OS).

Key Inclusion Criteria: * Documented evidence of recurrent/persistent endometrial cancer (endometrial carcinoma or carcinosarcoma). * Up to 3 prior lines of systemic therapy for endometrial cancer, including systemic platinum-based chemotherapy and anti-PD-1/PD-L1 therapy, either in combination or separately. * Eligible for treatment with either doxorubicin or paclitaxel as determined by the investigator. * Radiologically evaluable disease (either measurable or nonmeasurable) by computed tomography (CT) or magnetic resonance imaging (MRI) per RECIST v1.1. * Eastern Cooperative Oncology Group performance status score of 0 or 1. * Adequate organ function Key Exclusion Criteria: * Uterine leiomyosarcoma and endometrial stromal sarcomas are excluded. * Participants who are candidates for curative-intent therapy at the time of study enrollment. * Participants eligible for rechallenge with platinum-based chemotherapy as determined by the investigator. * Received any prior treatment with a Trop-2-directed antibody-drug conjugate (ADC). * Have an active second malignancy. * Have an active serious infection requiring systemic antimicrobial therapy. * Have active chronic inflammatory bowel disease (ulcerative colitis, Crohn's disease) or gastrointestinal perforation within 6 months prior to randomization. * Have a positive serum pregnancy test or are breastfeeding for participants who are assigned female at birth. Note: Other protocol defined Inclusion/Exclusion criteria may apply.