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Inclusion and exclusion criteria for studies included in this meta-analysis
| Inclusion criteria | Exclusion criteria |
|---|---|
| Examined both vitrification and slow freezing | Conference abstracts |
| Human ovarian tissue samples | Review articles |
| Used at least one of the four primary outcomes of this meta-analysis as a measure of comparison | Animal model studies |
| Original data (retrospective, prospective, or clinical trial) | No enough data reported to be included in meta-analysis |
