Inclusion Criteria:

• Premature ovarian insufficiency: ① Women aged >18 and <40 years old; ② Oligomenorrhea or amenorrhea for more than 4 months (excluding pregnancy); ③ Basal follicle stimulating hormone (FSH) >25IU/L (interval >4 weeks) at least 2 times, or total antral follicles (AFC) <5, or anti-Mullerian hormone (AMH) <1.1ng/mL.
• Poor ovarian response: ① Advanced age (≥40 years) or other risk factors for poor ovarian response; ② Poor ovarian response in previous IVF cycle, with ≤3 oocytes retrieved using conventional protocols; ③ Decreased ovarian reserve (antral follicle count <5~7 or anti-Müllerian hormone <0.5~1.1 ug/L). Meeting any 2 of the above 3 criteria is sufficient.
• Intrauterine adhesion: ① Diagnosed by hysteroscopy and scored ≥5 points according to the American Fertility Society criteria (1988); ② With symptoms such as reduced menstrual flow amenorrhea, periodic lower abdominal pain, infertility, or recurrent miscarriage; ③ Adult women with the desire to conceive.
• Thin endometium: ①Endometrial thickness <7mm on ovulation day or on the day of human chorionic gonadotropin (HCG) injection, or <7mm on progesterone conversion day when using conventional hormone replacement therapy, ②adult women with the desire to comceive.
• Repeated implantation failure: Women under 40 years old who have failed to achieve clinical pregnancy after transplanting at least three high-quality embryos within three fresh or frozen cycles. High-quality embryos include: Day 3 embryos (with ≥8 cells, evenly sized blastomeres, and <10% fragmentation) and blastocysts (≥3BB).

Exclusion Criteria:

• Alanine aminotransferase > 3 times the normal upper limit or estimated glomerular filtration rate (EGFR) < 90 ml/min;
• Suffering from hemorrhagic diseases (such as hemophilia) or taking anticoagulant or antiplatelet drugs;
• Suffering from serious mental illness, cardiovascular and cerebrovascular diseases and malignant tumors;
• Suffering from diabetes with poor blood sugar control or other systemic diseases;
• Drug abuse, alcoholism or drug addiction;
• Participated in other interventional clinical studies within half a year;
• Poor compliance;
• Other circumstances that are not suitable for participating in the study.