TABLE 4.

Logistic regression analysis of SERC in oocytes that may affect the speed of blastocyst development.

Variables	OR	95% CI	P-value
Speed of blastocyst development
Age	1.071	0.952–1.206	0.254
No. of previous IVF times	1.022	0.632–1.654	0.928
Duration of sterility	0.994	0.853–1.159	0.943
Severity of male infertility	0.587	0.192–1.792	0.350
Endometriosis	0.797	0.284–2.240	0.667
Stimulation protocols (GnRHa)	1.373	0.568–3.321	0.482
SERC(+) oocytes	2.812	1.257–6.292	0.012

SERC, smooth endoplasmic reticulum cluster; GnRHa, gonadotropin-releasing hormone agonist; SERC (+) oocytes, blastocysts resulting from SERC (+) oocytes; CI, confidence interval; OR, odds ratio. Results with P < 0.05 were considered statistically significant.