Table 5.

Prognostic factors of clinical pregnancy after univariate analysis

	Clinical pregnancy (n = 109)	No clinical pregnancy (n = 158)	p value
Female age
≤ 35 years old (n = 133)	63 (47.4%)	70 (52.6%)	0.03*
> 35 years old (n = 134)	46 (34.3%)	88 (65.7%)
Blastocyst expansion time
Day 5 (n = 190)	87 (45.8%)	103 (54.2%)	0.01*
Day 6 (n = 77)	22 (28.6%)	55 (71.4%)
ICMa
Grade A (n = 68)	31 (45.6%)	37 (54.4%)	0.527
Grade B (n = 164)	66 (40.2%)	98 (59.7%)
Grade C (n = 35)	12 (34.3%)	23 (65.7%)
TEa
Grade A (n = 82)	39 (47.6%)	43 (52.4%)	0.069
Grade B (n = 155)	63 (40.6%)	92 (59.3%)
Grade C (n = 30)	7 (23.3%)	23 (76.7%)

*Significant difference (p < 0.05)

^aAccording to Gardner and Schoolcraft blastocyst classification