TABLE 4.

Multivariate regression analysis of live birth by stimulation protocol.

	Cycle with live birth (n = 89)	Cycle without live birth (n = 172)	OR	95% CI
GnRH antagonist protocol, n (%)	12 (13%)	57 (33%)	Reference	Reference
GnRH agonist protocol, n (%)	77 (87%)	115 (67%)	2.6	1.3–5.3
Female age, years	32.8 ± 3.9	34.8 ± 5.1	0.92	0.92–0.98
Estradiol level on triggering day, pg/ml	2465 ± 1191	2127 ± 1353	1.0	1.0–1.0
Number of retrieved oocytes, n	10.0 ± 5.3	8.2 ± 4.9	1.0	0.9–1.1
Antral follicle count, n	11 ± 6	10 ± 7	1.0	0.9–1.1

OR adjusted for female age, estradiol level on triggering day, number of retrieved oocytes and antral follicle count. The selection of confounders was based on univariate analysis (Supplementary Table 1).