| EW | Early Weaning |
| E2 | 17β-Estradiol |
| EPM | Elevated Plus Maze |
| NPY | Neuropeptide Y |
| AgRp | Agouti-Related Protein |
| GABA | γ-aminobutyric Acid |
| mGluR5 | Metabotropic Glutamatergic Receptor 5 |
| ERα | Estrogen Receptor Alpha |
| OECD | Organization for Economic Cooperation and Development |
| UFPE | Federal University of Pernambuco |
| CEUA | Ethics Committee on the Use of Animals |
| CAPES | Coordination for Improvement of Higher Education Personnel |
| CNPq | Brazilian National Council for Scientific and Technological Development |
| PROCAD | National Academic Cooperation Program |