Animals 4 Chorionic Gonadotropin, beta Subunit, Human Mice 4 Mice, Transgenic 4 animal cell 4 animal experiment 4 animal model 4 article 4 controlled study 4 nonhuman 4 transgenic mouse 4 3-Hydroxysteroid Dehydrogenases 2 3beta hydroxy delta5 steroid dehydrogenase 2 Adenoma 2 Adult Leydig cell 2 Analysis of Variance 2 Animalia 2 Cell Proliferation 2 Cells, Cultured 2 Cyclin-Dependent Kinase 4 2 Female 2 Fetal Leydig cell 2 Fetus 2 Gene Expression Regulation, Developmental 2 Gene Expression Regulation, Neoplastic 2 Glycoprotein Hormones, alpha Subunit 2 Humans 2 Intramolecular Oxidoreductases 2 Leydig Cells 2 Leydig cell 2