Table 1.

Clinical characteristics of the participants included in the study

Parameter	RIF group (n = 13)	Control group (n = 15)
Age (years)	34.0 ± 3.9	33.3 ± 3.2
Duration of infertility (years)	7.9 ± 4.3*	3.5 ± 1.5
Number of previous cycles received	3.7 ± 1.1*	1.0 ± 0.0
Fertilization rate (%)	57.6	64.3
Cleavage rate (%)	98.1	100
Good quality embryo rate (%)	63.5	69.7
Number of embryos transferred	3.1 ± 0.7	2.5 ± 0.6
HCG-day endometrial thickness (mm)	8.0 ± 0.8	8.9 ± 0.9

Data are presented as the mean ± standard deviation or as a percentage.

^* P < 0.05.

RIF, repeated in vitro fertilization failure; HCG, human chorionic gonadotropin.