Table 3.
Newcastle-Ottawa scale of each outcome.
| Outcome | Effect (95%CI) | I 2 | Newcastle-Ottawa scale of each study |
|---|---|---|---|
| Clinical pregnancy rates | RR 0.97 (0.94, 0.99) | 0 | 9,9,8,6,7,8,8,9,8,8,8,8,7,8,9,8,8 |
| Biochemical pregnancy rates | RR 0.95 (0.88, 1.03) | 58 | 8,9,8,8,8,8,7,9 |
| Ongoing pregnancy rates | RR 0.93 (0.87, 0.99) | 13 | 9,9,8,9,7,9 |
| Implantation rates | RR 1.02 (0.97, 1.07) | 0 | 9,7,8,8,8,9 |
| No. of oocytes | MD 0.12 (−0.65, 0.88) | 51 | 8,9,8,8,9,8,8,8,8 |
| No. of MII/mature oocytes | MD 0.27 (−0.36, 0.90) | 13 | 9,9,8,9,8,8,8 |
| Blastocysts rates | MD 0.01 (−0.04, 0.06) | 0 | 9,8,8,8,8 |
| Fertilization rates | MD 1.08 (−0.57, 2.73) | 36 | 9,8,8,8,8,8 |
CI, confidence interval; MD, Mean Difference; RR, risk ratio.