animal experiment 8 article 8 cancer graft nonhuman 8 animal cell 6 animal model 6 controlled study 6 female 6 Animal 4 Rats 4 cancer cell culture 4 experimental neoplasm 4 gonadotropin 4 intraperitoneal drug administration 4 luteoma 4 mouse 4 ovary tumor 4 rat 4 sarcoma 180 4 spleen 4 unclassified drug 4 Adenocarcinoma 2 Animalia 2 Carcinoma, Ehrlich Tumor 2 Cobra Venoms 2 Crotalid Venoms 2 Crotoxin 2 Ehrlich ascites tumor 2 Ehrlich ascites tumor cell 2 English Abstract 2