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Table 2 The characteristics and pregnancy outcomes in the PCOS group and the control group after PSM

From: Pregnancy outcomes in patients with polycystic ovary syndrome who conceived after single thawed blastocyst transfer: a propensity score-matched study

  control group PCOS group OR (95% CI) P-value
n 336 336 /  
Female age (year) 30, 7 30, 5 / 0.684
BMI (kg/m2) 21.6, 4.1 21.6, 3.8 / 0.928
      < 24 75.9% 75.6%   
      ≥ 24 24.1% 24.4%   
Endometrial preparation    /  < 0.001
     HRT cycles 59.5% (200/336)a 75.6% (254/336)b   
     NCs 36.3% (122/336)a 8.3% (28/336)b   
     LE cycles 1.2% (4/336)a 12.2% (41/336)b   
     GnRH-a cycles 3.0% (10/336)a 3.9% (13/336)a   
Trophectoderm grade    / 0.143
     A 32.4% 25.9%   
     B 64.0% 69.0%   
     C 3.6% 5.1%   
     Miscarriage rate    / 0.040
     early miscarriage rate 13.7% (46/336)a 14.0% (47/336)a   
     late miscarriage rate 0.6% (2/336)a 3.3% (11/336)b   
     Pregnancy complications rate 19.9% 25.6% 1.38 (0.96–1.99) 0.080
     Preterm birth rate 7.1% 10.7% 1.56 (0.91–2.68) 0.105
     Live birth rate 84.2% 79.5% 0.73 (0.49–1.08) 0.109
Neonatal weight    /  
     male infant 3345, 613 3300, 600   0.219
     female infant 3200, 550 3150, 625   0.169
  1. Non-normally distributed continuous data is presented with median and interquartile range. Categorical data are presented with percentages. BMI Body mass index, HRT Hormone replacement treatment, NCs Natural cycles, LE Letrozole, GnRH-a GnRH agonist, OR Odds ratio, CI Confidence interval. Different letters represent statistically significant differences between the two groups (P-value < 0.05)