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Table 1 Baseline characteristics of patients with miscarriage and live birth controls

From: Comparison of chromosomal status in reserved multiple displacement amplification products of embryos that resulted in miscarriages or live births: a blinded, nonselection case–control study

Characteristics Miscarriage cases (n = 28) Live-birth controls (n = 56) P value
Maternal age at oocyte retrieval, y 29.6 ± 3.7 29.6 ± 3.2 0.945
Maternal BMI, kg/m2 21.8 ± 3.1 21.3 ± 2.7 0.421
Gravidity 1.0 (0–4) 2.0 (0–4) 0.194a
Parity 0.0 (0–1) 0.0 (0–2) 0.932a
No. of previous miscarriages, n 1.0 (0–4) 2.0 (0–4) 0.095a
Basal E2 level, pg/ml 29.2 ± 9.4 29.0 ± 13.5 0.940
Basal FSH level, IU/ml 5.6 ± 0.9 5.5 ± 1.3 0.726
E2 level on HCG day, pg/ml 3141 ± 1387.9 3127 ± 1110.1 0.962
No. of retrieved oocytes 21.1 ± 10.7 19.3 ± 7.8 0.390
No. of good-quality blastocysts 6.8 ± 4.6 6.6 ± 3.4 0.809
No. of embryos available to transfer 6.9 ± 4.0 6.5 ± 2.8 0.618
Blastocyst transfer    0.380b
 D5 19 (67.9) 43 (76.8)  
 D6 9 (32.1) 13 (23.2)  
COS protocol    0.071b
 Long agonist 4 (14.3) 19 (33.9)  
 Short agonist 6 (21.4) 15 (26.8)  
 Antagonist 18 (64.3) 22 (39.3)  
  1. Values are presented as mean ± SD, n (range), or n (%)
  2. BMI body mass index, E2 estradiol, FSH follicle-stimulating hormone, HCG human chorionic gonadotropin, COS controlled ovarian stimulation
  3. aMann–Whitney U test
  4. bChi-square test