Table 1.

Binary regression analysis of the influence of embryo quality on days two or three on blastocyst formation and implantation chance

Predictor variable	Response variable	P	OR	CI: Lower	CI: Upper
Embryo quality on day two	Blastocyst formation	0.001	0.82	0.73	0.92
	Blastocyst implantation	<0.001	0.58	0.43	0.77
Embryo quality on day three	Blastocyst formation	<0.001	0.69	0.61	0.78
	Blastocyst implantation	0.001	0.63	0.48	0.83

OR: odds ratio. and CI: confidence interval