Table 4.

Univariable and multivariable logistic mixed-effects models evaluating predictors of live birth

Predictor	Univariable		Multivariable
	OR	95% CI	OR	95% CI
Initial serum β-hCG (per 10 units)	1.04	1.03, 1.04	1.04	1.03, 1.04
Age at egg retrieval (years)	0.99	0.97, 1.00	1.00	0.98, 1.01
BMI (kg/m2)	0.97	0.96, 0.99	1.00	0.98, 1.01
Stage: Blastocyst day 5 (Reference)	1.00		1.00
Stage: Blastocyst day 6	0.76	0.63, 0.91	0.7	0.57, 0.85
Stage: Blastocyst day 7	0.26	0.09, 0.72	0.26	0.09, 0.74
Stage: Cleavage	0.64	0.41, 0.99	1.10	0.69, 1.74
Number of embryos transferred	0.37	0.28, 0.49	0.44	0.39, 0.51
PGT-A (Yes)	2.37	1.95, 2.89	2.24	1.82, 2.76