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Table 3 Characteristics of live birth vs. non-live birth

From: Possibility of live birth in patients with low serum β-hCG 14 days after blastocyst transfer

Characteristics Live birth Non-live birth P
N 58 254  
Female age (years) 31.9 ± 4.7 32.5 ± 4.9 0.346
Male age (years) 34.8 ± 5.1 34.7 ± 5.1 0.837
Infertility duration (years) 4.6 ± 2.7 4.8 ± 3.5 0.625
No. of previous gestation    0.242
%(n)
 0 48.3 (28) 42.2 (107)  
 1–2 48.3 (28) 47.6 (121)  
 ≥ 3 3.4 (2) 10.2 (26)  
Causes of Infertility %(n)    0.805
 Tubal/ Peritoneal 55.2 (32) 48.0 (122)  
 Ovulatory dysfunction 8.6 (5) 10.2 (26)  
 Male factor 10.3 (6) 12.6 (32)  
 Others 25.9 (15) 29.1 (74)  
No. of previous transfer 1.8 ± 1.0 2.1 ± 1.3 0.187
AMH (ng/ml) 6.80 ± 5.29 6.63 ± 4.54 0.807
BMI (kg/m2) 21.9 ± 2.9 22.3 ± 3.5 0.434
Types of cycle    0.378
 Natural cycle 22.4 (13) 27.6 (70)  
 Artificial cycle 77.6 (45) 70.5 (179)  
 Stimulation cycle 0.0 (0) 2.0 (5)  
EMTa 5 days before transfer (mm) 8.6 (8.0,10.0) 8.5 (7.6,10.0) 0.327
Days of embryos transfer %(n)    0.807
 5 58.6 (34) 67.7 (172)  
 6 36.2 (21) 31.1 (79)  
 both 5&6 5.2 (3) 1.2 (3)  
No. of embryos transferred % (n)    0.574
 1 39.7 (23) 43.7 (111)  
 2 60.3 (35) 56.3 (143)  
Serum Pb 65.8 ± 29.4 53.1 ± 28.7 0.115
Serum E2b 1125 (479,1386) 891 (472,1871) 0.820
Serum β-hCG (mIU/ml) 196 (144, 221) 140 (84,216) 2.40E-5
  1. a EMT endometrium thickness. b Only 68 patients were tested for serum progesterone levels and 62 were tested for serum estradiol