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Table 3 Clinical outcomes for blastocyst cryopreserved SET cycles supported with IMP versus 8% Crinone vaginal gel

From: Intramuscular progesterone versus 8% Crinone vaginal gel for luteal phase support following blastocyst cryopreserved single embryo transfer: a retrospective cohort study

Clinical outcomea IMP
(n = 1594)
Crinone
(n = 116)
RR (95% CI)b
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)
  1. Values represent n (%). SET single embryo transfer, IMP intramuscular progesterone, RR Relative risk, CI confidence interval
  2. aAll values expressed as percentage of all transfers
  3. 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
  4. 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