| Table 4. Association between the number of transferred high quality embryos and single and multiple pregnancy rates by age group | ||||||
| Single gestation n (%) |
PR |
Multiple gestation n (%) |
PR |
P* Value |
||
| Age group | Nº Embryos | |||||
| 1 | 13 (100) | - | 0 (00.0) | - | 0.009 | |
| ≤ 35 years | 2 | 142 (69.3) | 1.00 | 63 (30.7) | 1.00 | - |
| 3 | 38 (59.4) | 0.85 | 26 (40.6) | 1.32 | - | |
| 4 | 2 (100) | - | 00 (00.0) | - | - | |
| 1 | 9 (100) | - | 0 (00.0) | - | 0.004 | |
| 36 e 39 years | 2 | 46 (68.7) | 1.00 | 21 (31.3) | 1.00 | - |
| 3 | 26 (63.4) | 0.92 | 15 (36.6) | 1.17 | - | |
| 4 | 1 (16.7) | 0.24 | 5 (83.3) | 2.66 | - | |
| 1 | 11 (100) | - | 0 (00.0) | - | 0.001 | |
| ≥ 40 years | 2 | 24 (96.0) | 1.00 | 1 (04.0) | 1.00 | - |
| 3 | 28 (84.8) | 0.88 | 5 (15.2) | 3.80 | - | |
| 4 | 4 (66.7) | 0.69 | 2 (33.3) | 8.32 | - | |