Table 1

Groups	Control	Assisted Hatched	P
Table 1. Characteristics of patients in which embryos were submitted to assisted hatching or not.
Female age	42.5 ± 0.5	42.6 ± 0.8	0.201
Fertilization rate	84.4 %	82.6 %	0.324
High-quality embryos rate	74.9%	75.8%	0.789
Embryos transferred	2.2 ± 0.9	2.1 ± 1.0	0.479

Mann-whitney and Chi squared tests