The Influence of Gut Microbiota on Ovarian Function: A Single-center, Randomized,Double Blind, Parallel-controlled, Exploratory Clinical Trial

Inclusion Criteria: * 1\. Ovarian dysfunction * Age \< 40 years old; ② Irregular menstruation or amenorrhea for ≥ 4 months; ③ Two abnormal FSH levels (POF: FSH \> 40 U/L; POI: FSH \> 25 U/L); 2. Agree to participate in the study and be able to provide biological samples as required; 3. Body mass index within the normal range (18.5 kg/m² ≤ BMI \< 24 kg/m²); 4. Strict contraception during treatment; Control group: 1. Women have normal ovarian function; 2. No history of menstrual irregularity and infertility; 3. Regular menstruation; 4. Normal FSH levels (\< 10 IU/L); 5. Age (\< 40 years old) and body mass index (within the normal range 18.5 kg/m² ≤ BMI \< 24 kg/m²) are matched with the case group; (The matching settings for the case group and the control group have been completed); Exclusion Criteria: * 1\. Difficult to cooperate with researchers; 2. Those with congenital reproductive system disorders; 3. Those with chromosomal disorders; 4. Those with other systemic diseases; 5. Those with a history of ovarian surgery resection; 6. Chemotherapy/radiotherapy treatment; 7. Patients who have used antibiotics, antifungal drugs, antiviral drugs, proton pump inhibitors, corticosteroids or oral contraceptives within 3 months; 8. Patients who have been taking large doses of probiotic preparations for a long time.