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Table 2 Embryo and cycle characteristics 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

  IMP
(n = 1594)
Crinone
(n = 116)
Autologous vs. donor embryos
 Autologous 1502 (94.2) 113 (97.4)
 Donor 92 (5.4) 3 (2.6)
 ICSI 837 (52.2) 60 (51.8)
Day of embryo cryopreservation
 Day 5 1333 (83.6) 94 (81.0)
 Day 6 261 (16.4) 22 (19.0)
 Endometrial thickness at trigger/mapping (mm) 9.5 ± 2.7 9.6 ± 2.6
 Biopsied embryos 310 (19.5) 18 (15.5)
Day of embryo transfer
 Day 5 1556 (97.6) 115 (99.1)
 Day 6 38 (2.4) 1 (0.9)
Embryo quality a, b
 Good 652 (40.9) 51 (44.7)
 Fair 444 (27.9) 31 (27.2)
 Poor 497 (31.2) 32 (28.1)
  1. Values represent n (%) or mean ± SD. SET single embryo transfer, IMP intramuscular progesterone, ICSI intracytoplasmic sperm injection
  2. a Embryo quality data missing for 1 IMP cycle and 2 Crinone cycles
  3. b Embryo quality defined according to the SART grading system