Table 1.

Demographic characteristics, cycle characteristics, and reproductive outcomes of included cycles

Parameter	Value
No. of cycles	3602
Age (y)	30.76 ± 4.73
BMI (kg/m2)	21.91 ± 4.68
Percentage of primary infertility (%)	72.3
Duration of infertility (y)	3.79 ± 2.84
Basal FSH (IU/L)	7.50 ± 2.21
No. of oocytes retrieved	13.36 ± 6.23
Fertilization rate (%)	75.59 ± 17.85
Clinical pregnancy rate (%)	55.31
HCG-OPU interval (min)	2218.34 ± 27.00
OPU-DN interval (min)	130.60 ± 46.53
DN-ICSI interval (min)	166.51 ± 60.29

Note: Data are presented as mean ± SD or n (%)

BMI body mass index, OPU oocyte pick-up, DN denudation, ICSI intracytoplasmic sperm injection