Table III.
Pregnancy outcome after the first IVF cycle.
| Group 1 (bariatric surgery patients) (n = 83) | Group 2 (non-operated, BMI-matched, patients) (n = 166) | Group 3 (non-operated obese patients) (n = 83) | Between-group comparisons P -Value | |
|---|---|---|---|---|
| Total number of embryos transferred, mean ± SD | 1.9 ± 1.5 | 2.2 ± 1.3 | 1.7 ± 1.3 | 0.057 |
| Number of embryos per transfer, mean ± SD | 1.7 ± 0.5 | 1.5 ± 0.5 | 1.3 ± 0.4 | 0.46 |
| Number of transfers, mean ± SD | 1.14 ± 0.73 | 1.44 ± 0.86 | 1.30 ± 0.93 | 0.034b |
| Proportion of transfers at the blastocyst stage | 4 | 3 | 10 | 0.062 |
| Cumulative pregnancy rates after first IVF cycle (%) | 37.3 | 40.4 | 27.7 | 0.204 |
| Implantation rate after first IVF (%) | 13.8 | 13.7 | 6.9 | 0.09 |
| Live birth rate per transfer (%) | 20.0 | 18.0 | 9.3 | 0.0167a,c |
| Cumulative live birth rates after first IVF cycle (%) | 22.9 | 25.9 | 12.0 | 0.042c |
| Number of remaining cryopreserved embryos for patients having delivered a live baby mean ± SD | 2.16 ± 2.83 | 2.09 ± 2.69 | 0.7 ± 0.48 | 0.273 |
| Number of remaining cryopreserved embryos for patients not having delivered a live birth mean ± SD | 0.50 ± 1.41 | 0.80 ± 1.82 | 0.55 ± 1.45 | 0.398 |
| Pregnancy loss (%) | 38.7 | 35.8 | 56.5 | 0.256 |
| Gestational age at delivery (weeks), mean ± SD | 38.3 ± 3.3 | 39.1 ± 1.0 | 39.7 ± 1.2 | 0.419 |
| Birthweight (g) mean ± SD | 2753 ± 734 | 3170 ± 863 | 3482 ± 263 | 0.044a |
| Twin birth rate (%) | 15.8 | 14.0 | 0 | 0.609 |
| Vaginal delivery (%) | 68.4 | 69.0 | 70.0 | 1 |
Chi2 test was applied for comparing qualitative variables and ANOVA for quantitative variables.
a
Comparing Group 1 to Group 3;
b
comparing Group 1 to Group 2;
c
comparing Group 2 to Group 3.