Table 2.

Multivariate logistic regression analysis of factors related to pregnancy outcomes, P4 threshold 10 ng/mL

	Adjusted OR (95% CI)	p value
Biochemical Pregnancy
P4 ≥ 10 ng/mL	1.14 (0.94; 1.37)	0.19
Age (years)	0.94 (0.92; 0.96)	0.00
D5 blastocyst	2.23 (1.81; 2.74)	0.00
Blastocyst expansion grade^	0.67 (0.60; 0.74)	0.00
Previous clinical pregnancy	1.34 (1.08; 1.66)	0.007
Clinical pregnancy
P4 ≥ 10 ng/mL	1.20 (0.96; 1.50)	0.11
Age (years)	0.94 (0.91; 0.96)	0.00
D5 blastocyst	2.11 (1.64; 2.70)	0.00
Blastocyst expansion grade^	0.65 (0.57; 0.74)	0.00
Previous clinical pregnancy	1.20 (0.94; 1.54)	0.152
Live birth
P4 ≥ 10 ng/mL	1.22 (0.95; 1.58)	0.12
Age (years)	0. 92 (0.89; 0.95)	0.00
D5 blastocyst	1.77 (1.33, 2.35)	0.00
Blastocyst expansion grade^	0.75 (0.65; 0.87)	0.00
Previous clinical pregnancy	0.96 (0.72; 1.29)	0.805

^ as surrogate marker of embryo quality