This study is for women with endometrial cancer. The purpose is to find out if adding a new immunotherapy drug to the usual combination of chemotherapy drugs can lower the chance of your endometrial cancer growing or spreading.

This study is for women who have ovarian cancer, fallopian tube cancer or primary peritoneal cancer which has grown or recurred. The purpose of this study is to compare any good and bad effects of adding Atezolizumab to the usual chemotherapy (liposomal doxorubicin) and to the usual chemotherapy with bevacizumab. Atezolizumab is a PD-L1 inhibitor that may allow the immune system to recognize and destroy tumor cells.

This study is for adult women who have advanced or recurrent endometrial (uterine) cancer. The purpose is to find out if the drug combination of paclitaxel, carboplatin and metformin works better than paclitaxel and carboplatin alone in treating uterine cancer.