Animals 8 Cell Proliferation 8 Estrogen Receptor beta cell proliferation 8 estrogen receptor beta 8 Estrogen Receptor alpha 6 Rats 6 Signal Transduction 6 animal cell 6 controlled study 6 nonhuman 6 priority journal 6 rat 6 signal transduction 6 Active Transport, Cell Nucleus 4 Animalia 4 Cell Nucleus 4 Cytoplasm 4 Endometrium 4 Enzyme Activation 4 Female 4 Genes, Reporter 4 Genome 4 Male 4 Mitogen-Activated Protein Kinase 1 4 Mitogen-Activated Protein Kinase 3 4 Mutation 4 Progestins 4 Promegestone 4 Proto-Oncogene Proteins c-akt 4