Morphokinetic Characteristics and Developmental Potential of In Vitro Cultured Embryos from Natural Cycles in Patients with Poor Ovarian Response

Table 2

Prevalence of different types of cleavage irregularities, relationship with classical morphology score at the time of transfer, and live births in 53 natural cycles of poor responders.

	Frequency	Good quality embryo; (at the time of transfer); (%)	Live births
Normally developing embryos	26 (49.1)	16 (30.2)	6
Embryos with single irregularity	16 (30.2)	2 (3.8)	0
Direct division in >2 blastomeres	7 (13.2)	2 (3.8)	0
Chaotic cleavage	1 (1.9)	0 (0)	0
Reverse cleavage	0 (0)	0 (0)	0
Developmental arrest	8 (15.1)	0 (0)	0
Embryos with multiple irregularities	11 (20.8)	0 (0)	0
Total	53	18 (34,0)	6

Note: values in parentheses are percentages.