| PCOS | Polycystic Ovarian Syndrome |
| PTPRF | Protein Tyrosine Phosphatase, Receptor type, F |
| PRL | Peptide hormone Prolactin |
| LTH | Luteotropin |
| PRISMA | Preferred Reporting Items for Systematic Reviews and Meta-Analyses |
| PICOs | Participants, Intervention, Comparators, Outcomes |
| RoB | Risk of Bias |