Table 4.

Logistic regression model of the possible factors associated with clinical pregnancy in vitrified blastocyst cycles on egg donation program, All.

	Odds ratio	95% CI	P value
Patient age	0.96	0.94–0.99	0.005
Donor age	0.99	0.95–1.02	0.65
Sperm quality	1.13	0.81–1.58	0.46
Top vs. fair	1.57	1.10–2.24	0.01
Good vs. fair	1.39	1.04–1.87	0.02
Fertilization rate	0.71	0.32–1.58	0.41
Cleavage rate	0.91	0.32–2.62	0.87
Weighted score day 3	0.94	0.68–1.30	0.74
Blastulation rate	0.93	0.44–1.95	0.86
Freezing rate	1.00	0.99–1.01	0.14
Day 5 vs. day 6	1.91	1.43–2.54	< 0.001
Total cycles	0.89	0.83–0.96	< 0.001