| OR | Odds ratio |
| C-Section | Caesarean birth |
| UI | Urinary incontinence |
| FI | Fecal incontinence |
| AI | Anal incontinence |
| pH | Hydrogen potential |
| CI | Confidence interval |
| I2 | I squared |
| PGE1 | Prostaglandin E1 |
| PGE2 | Prostaglandin E2 |
| WHO | World Health Organization |
| HGUGM | Gregorio Marañón General University Hospital in Madrid |