The investigators plan to retrospectively analyze clinical data from 14,189 fresh ICSI cycles in Reproductive and Genetic Hospital of CITIC-Xiangya from January 2016 to December 2017.The investigators will regard total progressive sperm number of 2 x 10\^6 after pretreatment as the boundary value, and will divide total progressive sperm number of 2 x 10\^6 after pretreatment into 2 x 10\^6 or higher and \< 2 x 10\^6 groups, and will further divide \< 2 x 10\^6 group into: = 0, (0,10\^6\], (10\^6, 2 x 10\^6) three groups. Propensity score matching will be used to balance the baseline data between four groups. The matching variables are age, female BMI, AFC, AMH and ICSI.
Study Type
OBSERVATIONAL
Enrollment
12,215
semen pretreatment
Reproductive & Genetic Hospital of CITIC-XIANGYA
Changsha, Hunan, China
high quality embryo rate for ICSI
rate of embryo grade above 6CI on the third day after fertilization
Time frame: two years
fertilization rate of ICSI
number of fertilized oocytes/ number of metaphase II oocytes
Time frame: two years
normal fertilization rate of ICSI
number of 2PN fertilized oocytes/ number of metaphase II oocytes
Time frame: two years
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