Table 6.
Perinatal outcomes after fresh elective single embryo transfer (eSET) versus fresh double embryo transfer (DET) in women with live birth. Figures are numbers (percentages) unless stated otherwise
| eSET (n=181) | DET (n=284) | Odds ratio (95% CI) | ||
|---|---|---|---|---|
| Crude* | Adjusted | |||
| Delivery of at least one low birthweight baby (<2500 g) | 14 (8%) | 69 (24%) | 0.26 (0.14 to 0.48) | 0.36 (0.15 to 0.87)† |
| Term singleton delivery | 158 (87%) | 169 (60%) | 4.93 (2.98 to 8.18) | As crude‡ |
| Preterm delivery (weeks): | ||||
| 24-37 | 23 (13%) | 85 (30%) | 0.33 (0.20 to 0.55)§ | As crude‡ |
| 24-34 | 6 (3%) | 29 (10%) | 0.29 (0.12 to 0.72) | 0.30 (0.12 to 0.75)¶ |
| 24-32 | 1 (<1%) | 16 (6%) | 0.09 (0.01 to 0.70) | 0.08 (0.01 to 0.65)** |
*Estimated from logistic model adjusted for eSET v DET and trial.
†Adjusted for gestational age. Bhattacharya trial excluded as no low birthweight babies.10
‡No significant covariates, so adjusted as for crude odds ratio.
§Bhattacharya trial excluded as no preterm births.10
¶Adjusted for female age. Bhattacharya,10 Gerris et al,29 and Thurin (2005)9 excluded as no preterm births ≤34 weeks.
**Adjusted for female BMI and duration of infertility. Davies, Bhattacharya,10 Gerris et al,29 and Thurin (2005)9 excluded as no preterm births ≤32 weeks.