GH plays an important role in the synthesis of ovarian steroid hormone and follicular development as a paracrine hormone.GH can regulate the growth hormone receptor and strengthen the function of mitochondria to improve the quality of the female oocyte.In this study, a prospective randomized control was used to explore the effect of GH adjuvant therapy on embryo quality.

Inclusion Criteria:

• 1)infertility women whose age ≥20 and ≤39 years old; 2)women has done IVF/ICSI assisted treatment ≥1 times； 3)number of IVF/ICSI assisted treatment cylces with ≥6 oocytes retrieved ≥1； 4)number of IVF/ICSI assisted treatment cylces with ≥50% fertilization rate ≥1 ; 5)historical assisted reproduction cycles without ≥6C-Ⅱ level embryos at the third day after oocytes retrieval or without blastocyst formation after blastocyst culturing.

Exclusion Criteria:

- 1) Diseases related to IVF treatment outcome, such as untreated hydrosalpinx, uterine fibroids affecting uterine cavity, myometriosis, endometrial lesions, obvious uterine abnormalities,etc; 2)Severe acute or chronic liver or kidney diseases, such as cirrhosis, acute or chronic renal failure, hepatitis B virus activity period,etc.;in patients with abnormal liver and kidney function, the AST or ALT detection value was 2.5 times higher than the upper limit of normal, and the serum creatinine was 2 times higher than the upper limit of normal.

3)Endocrine and metabolic diseases and adrenal diseases, such as diabetes, Cushing's syndrome,etc.; 4)People has allergy history of growth hormone product; 5)Participating in other clinical research; 6)Other conditions that researchers determined not fit to be enrolled.