Table 4.

Comparing the timing of the embryo biopsy at the cleavage stage to the blastocyst stage with the presence or absence of aneuploidy and/or the parental unbalanced translocation chromosome. Statistical comparisons were performed using chi-square analysis and a p-value of greater than 0.05 was considered not significant (NS)

	Cleavage stage	Blastocyst stage	p-value	Total
Molecular karyotypes	326	172		498
Euploid and no translocation imbalance	(45 %) 147	(46 %) 79	NS	(45 %) 226
Aneuploid and no translocation imbalance	(29 %) 96	(13 %) 23	P < 0.001	(24 %) 119
Euploid with translocation imbalance	(17 %) 56	(33 %) 56	P < 0.001	(23 %) 112
Aneuploid with translocation imbalance	(8 %) 27	(8 %) 14	NS	(8 %) 41