From: Laser-assisted hatching in lower grade cleavage stage embryos improves blastocyst formation: results from a retrospective study
LAH
N-LAH
P
No. of LGCE
948
808
The rate of dark coloration and fragmentation on D5 (%)
3.2(30/948)
3.7(30/808)
> 0.05
The rate of dark coloration and fragmentation on D6 (%)
34.2(324/948)
49.6(401/808)
< 0.001