Table 2.
Summary of pooled results by type of ART and OR (95% CI)
| Outcomes | N births (studies) | I2 (%) | OR; 95% CI random effect |
N births (studies) |
I2 (%) | OR; 95% CI random effect |
|---|---|---|---|---|---|---|
| Fresh ET after IVF/ICSI | Frozen ET after IVF/ICSI | |||||
| PTBa | 7,607.683 (7) | 97 | 1.64 [1.46, 1.84] | 3,159.357 (6) | 0 | 1.39 [1.34, 1.44] |
| LBWa | 7,606.837 (6) | 94 | 1.67 [1.52, 1.85] | 3,442.415 (5) | 98 | 1.38 [0.91, 2.09] |
| SGAa | 3,265.275 (5) | 99 | 1.46 [1.11, 1.92] | 3,153.600 (5) | 94 | 0.83 [0.57, 1.19] |
| LGAa | 3,265.275 (5) | 80 | 0.88 [0.80, 0.97] | 3,153.600 (5) | 22 | 1.57 [1.48, 1.68] |
| Fresh ET after IVF | Frozen ET after IVF | |||||
|---|---|---|---|---|---|---|
| PTBb | 1,514.569 (4) | 80 | 2.02 [1.50, 2.72] | 1,497.982 (2) | 86 | 1.47 [0.96, 2.24] |
| LBWb | 1,219.779 (2) | 0 | 1.71 [1.61, 1.81] | – | – | – |
| Fresh ET after ICSI | Frozen ET after ICSI | |||||
|---|---|---|---|---|---|---|
| PTBb | 4,381,432 (3) | 99 | 6.86 [0.75, 62.45] | – | – | – |
IVF in vitro fertilization, ICSI intracytoplasmic sperm injection, SC spontaneous conceptions, fresh ET fresh embryo transfer, frozen ET frozen embryo transfer
aMatched or adjusted studies
bSome studies no matched or adjusted