Estradiol receptor alpha Insulin-like growth factor binding protein Prepubertal mammary gland Proliferating cell nuclear antigen Animals Anthelmintics Cattle Cell Proliferation Chromogranin A Ciencias Veterinarias Coipo Coypu Cromogranina A Duodeno Duodenum Estradiol Estrogen Receptor alpha Female Fenbendazole Feto Fetus Gastrointestinal Tract Insulin-Like Growth Factor Binding Protein 2 Insulin-Like Growth Factor Binding Protein 3 Insulin-Like Growth Factor I Ivermectin Levamisole Mammary Glands, Animal Myocastor coypus Nematoda