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Table 1 Characteristics of patients and blastocyst morphology for all clinical pregnancy cycles

From: Association between the quality of inner cell mass and first trimester miscarriage after single blastocyst transfer

VariableMiscarriage
(n = 354)
No miscarriage
(n = 2519)
P value
Maternal age at oocyte retrieval, y28.6 ± 3.128.2 ± 3.00.006
Prior gravidity0.8 ± 1.00.8 ± 1.00.283
Prior parity0.2 ± 0.40.2 ± 0.50.692
Body mass index (BMI), kg/m223.2 ± 3.423.0 ± 5.10.180
Basal FSH, mIU/mL6.3 ± 1.86.2 ± 1.60.359
Paternal age, y30.0 ± 3.729.4 ± 3.50.007
Endometrial thickness, mm11.2 ± 2.511.7 ± 2.60.001
Infertility diagnosis, n (%)  0.310
 Tubal factor117 (33.1)954 (37.9) 
 Ovulatory disfunction56 (15.8)316 (12.5) 
 Diminished ovarian reserve8 (2.3)51 (2.0) 
 Male factor81 (22.9)547 (21.7) 
 Unknown factor92 (26.0)651 (25.8) 
Fertilization method, n (%)  0.392
 IVF257 (72.6)1773 (70.4) 
 ICSI97 (27.4)746 (29.6) 
Cycle type, n (%)  < 0.001
 Fresh153 (43.2)1499 (59.5) 
 Frozen201 (56.8)1020 (40.5) 
Development days of blastocyst, n (%)  < 0.001
 Day 5292 (82.5)2288 (90.8) 
 Day 662 (17.5)231 (9.2) 
Expansion degree, n (%)  0.496
 13 (0.8)26 (1.0) 
 221 (5.9)101 (4.0) 
 392 (26.0)699 (27.7) 
 4227 (64.1)1586 (63.0) 
 59 (2.5)93 (3.7) 
 62 (0.6)14 (0.6) 
ICM grade, n (%)  0.404
 A124 (35.0)940 (37.3) 
 B230 (65.0)1579 (62.7) 
TE grade, n (%)  0.012
 A46 (13.0)423 (16.8) 
 B201 (56.8)1503 (59.7) 
 C107 (30.2)593 (23.5) 
  1. Values are presented as means ± SD or frequency (percentage)