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GRADE quality of evidence
| Outcome | No studies | Risk of bias | Inconsistency | Indirectness | Imprecision | Publication bias | Quality | |
|---|---|---|---|---|---|---|---|---|
| Sample size | Wide CI | |||||||
| Implantation rate | 6 | N | S | N | 886 | N | N | Moderate |
| Clinical pregnancy rate | 11 | S | S | N | 1289 | N | N | Low |
| Chemical pregnancy rate | 7 | N | N | N | 726 | N | N | High |
| Ongoing pregnancy rate | 5 | N | S | N | 488 | N | N | Low |
| Live birth rate | 4 | S | S | N | 523 | S | N | Very low |
| Endometrial thickness | 4 | S | N | N | 307 | N | N | Low |
CI, confidence interval; N, not serious; S, serious
