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Table 1 Patient characteristics

From: Pregnancy rates of day 4 and day 5 embryos after culture in an integrated time-lapse incubator

Patient characteristics Day 4 transfers Day 5 transfers p-value
maternal age (years) 35.3 ± 0.37 35.0 ± 0.21 ns (p = 0.499)
IVF cycles (n) 31 149
ICSI cycles (n) 91 305
cycles with splitting IVF/ICSI (n) 2 21
oocytes (n) 11.02 ± 0.46 10.91 ± 0.24 ns (p = 0.826)
mature oocytes (MII) in ICSI cycles (n) 8.83 ± 0.45 8.67 ± 0.23 ns (p = 0.743)
PN/cycle 6.44 ± 0.28 6.16 ± 0.13 ns (p = 0.343)
cycles with calcium ionophore 9 (7.3%) 40 (8.4%) ns (p = 0.854)
cycles with assisted hatching 6 (4.8%) 23 (4.8%) ns (p = 1.0)
cycles with polar body biopsy 7 (5.6%) 12 (2.5%) ns (p = 0.087)
no of transferred embryos SET: N = 12
DET: N = 110
TET: N = 2
SET: N = 82
DET: N = 387
TET: N = 6
s for SET (p = 0.038)
ns for DET (p = 0.061)
ns for TET (p = 0.673)
mean no of transferred embryos 1.92 ± 0.03 1.84 ± 0.02 s (p = 0.023)
transferred ideal embryos 99/238 (41.6%) 385/874 (44.1%) ns (p = 0.508)
transferred embryos with timely developmental stage (day 4 = morula; day 5 = blastocyst) 99/238 (41.6%) 809/874 (92.9%) s (p < 0.001)
frozen PN/cycle 2.04 ± 0.26 1.81 ± 0.12 ns (p = 0.388)
frozen embryos/cycle 0.32 ± 0.06 0.37 ± 0.03 ns (p = 0.462)
  1. Values are given as mean ± SEM or % (n/total), unless otherwise indicated; SET single embryo transfer, DET double embryo transfer, TET triple embryo transfers, ns non-significant, s significant (p < 0.05)