Table 5.

Multivariable logistic regression analysis of factors associated with live birth.

	OR	95%CI	p
Age < 38 years	2.11	1.16-3.83	0.015
Body mass index	1.01	0.98-1.04	0.531
Infertility duration	1.00	0.95-1.05	0.888
Previous IVF attempts	0.99	0.88-1.11	0.875
Protocol (incremental)	Ref
Fixed protocol	0.96	0.67-1.37	0.820
Normal ovarian reserve	Ref
Diminished ovarian reserve	0.85	0.54-1.33	0.474
Polycystic ovary syndrome	0.93	0.65-1.35	0.717
Double blastocyt transfer	2.29	1.57-3.34	<0.001
High-quality blastocyst transfer	1.83	1.29-2.58	<0.001
On progesterone initiation
Endometrial thickness	1.08	0.96-1.21	0.191
Estradiol level	1.00	1.00-1.00	0.710
Progesterone level	1.1	0.51-2.35	0.815
Short estradiol exposure	Ref
Intermediate estradiol exposure	1.25	0.88-1.78	0.204
Prolonged estradiol exposure	0.93	0.57-1.51	0.775

OR and CI denote odds ratio and confidence interval.

Bold values indicate statistically significant associations (p < 0.05).