Type I endometrial cancer endometrioid adenocarcinomas grade 1 and 2 derived from atypical endometrial hyperplasia 1 2 Type II endometrial cancer endometrioid adenocarcinomas grade 3 and tumors of non endometrioid histology; serous, clear cell, mucinous, squamous, transitional, and undifferentiated cells 2 clomid pregnancy