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Table 2 Univariate analysis for clinical pregnancy rate

From: Effect of endometrial thickness changes on clinical pregnancy rates after progesterone administration in a single frozen-thawed euploid blastocyst transfer cycle using natural cycles with luteal support for PGT-SR- and PGT-M-assisted reproduction: a retrospective cohort study

Covariate OR (95% CI) P value
Female age at oocyte retrieval (y) 0.98 (0.91, 1.05) 0.590
BMI (kg/m2) 0.98 (0.89, 1.09) 0.707
Infertility duration (y) 0.94 (0.85, 1.05) 0.281
Infertility type
 Primary Reference  
 Secondary 0.90 (0.49, 1.65) 0.732
Gravidity 0.94 (0.79, 1.13) 0.532
Parity 0.85 (0.58, 1.24) 0.390
No. of miscarriages 0.99 (0.80, 1.22) 0.902
Basal serum FSH (mIU/ml) 0.93 (0.81, 1.07) 0.322
AMH (ng/ml) 1.07 (0.94, 1.22) 0.290
No. of retrieved oocytes 1.00 (0.97, 1.04) 0.951
Genetic category
 Reciprocal translocation Reference  
 Robertsonian translocation 0.85 (0.41, 1.74) 0.648
 Single gene disorders 1.06 (0.56, 2.01) 0.847
Female age at blastocyst transfer (y) 0.98 (0.91, 1.05) 0.596
Endometrial thickness on the day of P administration (mm) 0.93 (0.81, 1.07) 0.295
Endometrial thickness at transfer (mm) 1.04 (0.91, 1.19) 0.556
Triple-line endometrial pattern on the day of P administration
 A Reference  
 B 0.86 (0.36, 2.06) 0.734
Endometrial thickness change ratio after P administration 1.02 (1.00, 1.04) 0.034
E2 on the day of P administration (pg/mL) 1.00 (1.00, 1.00) 0.492
LH on the day of P administration (mIU/ml) 1.00 (0.98, 1.02) 0.970
P on the day of P administration (ng/ml) 0.99 (0.55, 1.79) 0.972
Morphology score
  < 4 BC Reference  
  ≥ 4 BC 1.23 (0.68, 2.20) 0.491
Day of embryo development at transfer
 Day 5 Reference  
 Day 6 0.76 (0.42, 1.38) 0.364
  1. Note: BMI body mass index, FSH follicle-stimulating hormone, AMH anti-Müllerian hormone, P progesterone, E2 estradiol, LH luteinizing hormone, OR odds ratio, CI confidence interval