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Table 3 demographic data of potential predictors in pregnant and non-pregnant women

From: Analysis of endometrial thickness patterns and pregnancy outcomes considering 12,991 fresh IVF cycles

Variables Pregnancy ( +) Non-pregnancy ( −) P value
(N = 3656) (N = 9335)
Age (years) 30.18 ± 4.13 32.42 ± 5.75 < 0.01
BMI (kg/m2) 21.88 ± 2.93 21.93 ± 2.90 0.3278
Cycle protocols    < 0.01
Long agonist protocol 2302 (63.0%) 4423 (47.4%)  
Short agonist protocol 575 (15.7%) 1870 (20.0%)  
Prolonged agonist protocol 565 (15.5%) 857 (9.2%)  
Other 214 (5.9%) 2185 (23.4%)  
Duration of infertility (years) 3.67 ± 2.68 4.25 ± 3.61 < 0.01
FSH (mIU/ml) 7.38 ± 2.57 8.05 ± 3.65 < 0.01
embryo transferred 1.86 ± 0.34 0.66 ± 0.87 < 0.01
HMG 8.05 ± 7.54 9.74 ± 8.92 < 0.01
Gntime 10 ± 1.78 9.82 ± 2.05 < 0.01
mature follicles 9.97 ± 3.93 9.47 ± 5.67 < 0.01
endometrial thickness on HCGday 11.68 ± 2.38 10.54 ± 2.81 < 0.01
E2 3362.93 ± 1756.74 3477.31 ± 2652.94 0.004228
Progesterone (ng/ml) 0.9 ± 0.30 1.23 ± 1.72 < 0.01
oocytes retrieved (n) 11.31 ± 4.59 11.33 ± 7.94 0.8667
endometrial morphology    < 0.01
a 2801 (76.6%) 5754 (61.6%)  
b 539 (14.7%) 1895 (20.3%)  
c 316 (8.6%) 1686 (18.1%)  
  1. Data are mean ± SD or number (percentage)
  2. BMI body mass index (kg/m2), FSH follicle-stimulating hormone
  3. aTwo-sample t-test
  4. bPearson χ2 test