A Randomized, Open-Label, Phase 3 Study of Sacituzumab Govitecan Versus Treatment of Physicians Choice in Participants with Endometrial Cancer Who Have Received Prior Platinum-Based Chemotherapy and Anti-PD-1/PD-L1 Immunotherapy.

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.