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Different methodologies used in the literature on women’s reproductive span.
| Design | Count |
|---|---|
| Case–control | 4 |
| Cohort | |
| Ambidirectional | 1 |
| Prospective | 3 |
| Retrospective | 6 |
| Cross-sectional | 42 |
| Reviews | |
| Meta-analysis | 3 |
| Narrative Review | 5 |
| Systematic Review | 1 |
| Systematic review and meta-analysis | 2 |
