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PICO (Population, Intervention, Comparison, Outcome) criteria for inclusion of studies
| Parameter | Inclusion criteria |
|---|---|
| Population | Studies accomplish in vitro and in vivo |
| Intervention | Anti‐infertility with Zingiber officinale (ginger) |
| Comparison | Ginger versus control |
| Outcome | Anti‐infertility properties of Zingiber officinale (ginger) especially in poultry |
