Clinical outcomea | IMP (n = 1594) | Crinone (n = 116) | RR (95% CI)b |
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Live birthc | 755 (47.4) | 48 (41.4) | 0.91 (0.73, 1.13) |
Biochemical pregnancy | 164 (10.3) | 13 (11.2) | 1.12 (0.65, 1.92) |
Spontaneous abortion | 163 (10.2) | 17 (14.7) | 1.41 (0.90, 2.20) |
Clinical pregnancy | 949 (59.5) | 68 (58.6) | 1.00 (0.86, 1.17) |
- Values represent n (%). SET single embryo transfer, IMP intramuscular progesterone, RR Relative risk, CI confidence interval
- aAll values expressed as percentage of all transfers
- bModels adjusted a priori for patient age at embryo cryopreservation. Generalized estimating equations were used to account for correlations between multiple cycles from the same woman
- cThree patients having received IMP were lost to follow-up after confirmation of clinical pregnancy and were therefore excluded from the live birth analysis.å