Table 1.
Summary of studies included in meta-analyses of mean stillbirth, farrowing duration, and/or interval between piglets. Check mark (✓) indicates which studies were included in each meta-analysis.
| Study | Study Objective | Stillbirth | Farrowing Duration | Interval between Piglets | Risk of Bias |
|---|---|---|---|---|---|
| [29] | Induction program | ✓ | ✓ | Some concern | |
| [30] | Farrowing assistance | ✓ | ✓ | ✓ | Some concern |
| [31] | Induction program | ✓ | Some concern | ||
| [32] | Induction program | ✓ | Some concern | ||
| [33] | Induction program | ✓ | Some concern | ||
| [34] | Induction program | ✓ | High Risk | ||
| [35] | Induction program | ✓ | ✓ | Some concern | |
| [36] | Induction program | ✓ | ✓ | Some concern | |
| [37] | Farrowing assistance | ✓ | ✓ | ✓ | Some concern |
| [38] | Induction program | ✓ | ✓ | ✓ | Some concern |
| [39] | Farrowing assistance | ✓ | ✓ | ✓ | Some concern |
| [40] | Farrowing assistance | ✓ | ✓ | ✓ | Some concern |
| [41] | Farrowing assistance | ✓ | ✓ | ✓ | Some concern |
| [42] | Farrowing assistance | ✓ | ✓ | ✓ | Some concern |
| [43] | Farrowing assistance | ✓ | ✓ | ✓ | Some concern |
| [44] | Farrowing assistance | ✓ | ✓ | ✓ | Some concern |
| [45] | Farrowing assistance | ✓ | ✓ | ✓ | Some concern |
| [46] | Farrowing assistance | ✓ | ✓ | Some concern | |
| [47] | Farrowing assistance | ✓ | Some concern | ||
| [48] | Induction program | ✓ | ✓ | Some concern | |
| [49] | Induction program | ✓ | Some concern | ||
| [50] | Farrowing assistance | ✓ | Some concern | ||
| [51] | Farrowing assistance | ✓ | ✓ | Some concern | |
| [52] | Induction program | ✓ | Some concern | ||
| [53] | Induction program | ✓ | ✓ | Some concern |