Extended culture of cleavage embryo to blastocyst embryo is among the good predictors of successful outcome in vitrified-thawed ICSI cycles

Middle East Fertility Society Journal

Table 4 Comparison of blastocyst and cleavage transfers in frozen cycles

Parameter	Blastocyst ET n = 688	Cleavage ET n = 344	P value
Female age (years)^a	28.79 ± 5.12	28.90 ± 5.19	0.751
Female BMI^a	31.79 ± 5.679	32.55 ± 6.506	0.08
Infertility duration (years)^a	4.36 ± 3.346	4.89 ± 3.772	0.03
Endometrial thickness (mm)^a	10.35 ± 1.97	10.31 ± 1.92	0.77
Total number of embryos (n)^a	3.26 ± 1.6	3.16 ± 1.61	0.3
Clinical pregnancy rate (%)^b	202/688 (29.3%)	92/344 (26.7%)	0.43

^aData are presented as mean ± SD and were assessed using t-test
^bData presented as numbers (percentage) and were assessed using Fisher’s exact test