Patient description: A 35-year-old woman presents with history of acne and mild hirsutism. The primary evaluation revealed elevated testosterone levels. She recently noticed gradual enlargement of her hands and feet and recognized that her ring is getting small for her finger. There is some irregularity in her menstrual cycle as well as some nipple discharge. She also has positive history for snoring and headache. The physical examination revealed subtle facial features of acromegaly and prognathism. Visual fields are normal by confrontation. Hirsutism, soft tissue thickening and diaphoresis of the hands and feet are noted. Laboratory evaluation in the fasting state reveals IGF-1 of 968 ng/mL and random GH of 19.7 ng/mL. MRI reveals a macroadenoma with no invasion. She is on stable doses of octreotide LAR since her diagnosis was confirmed. She is married and has 2 children. She is using IUD as her contraceptive method.

Clinical trial eligibility criteria: eligible ages (years): 18.0-999.0,  Ovarian Neoplasms Fallopian Tube Neoplasms Endocrine Gland Neoplasms Neoplasms by Site Neoplasms Genital Neoplasms, Female Urogenital Neoplasms Neoplasms, Glandular and Epithelial Neoplasms by Histologic Type Carcinoma, Ovarian Epithelial Ovarian Diseases Adnexal Diseases Genital Diseases, Female Endocrine System Diseases Gonadal Disorders Carcinoma Bevacizumab Enzyme Inhibitors Antineoplastic Agents Molecular Mechanisms of Pharmacological Action Angiogenesis BRCA1 Mutation BRCA2 Mutation Homologous Recombination Deficiency Subjects understand the trial process, sign informed consent, agree to participate in the study, and have the ability to follow the protocol; 2. Participant must be female ≥18 years of age; 3. Histologically confirmed FIGO stage III or IV ovarian cancer, fallopian tube cancer, or primary peritoneal cancer; 4. Participants must have high-grade serous or endometrioid histology; 5. Subjects were initially treated with platinum, and the disease recurrence occurred within 6 months after the end of the previous platinum-containing chemotherapy, that is, platinum resistance relapsed; Subjects have disease progression during initial platinum based chemotherapy defined as platinum refractory; 6. Patients may have received a PARP inhibitor as first-line maintenance therapy; 7. Patients may have received bevacizumab though no other prior use of anti-angiogenic therapy； 8. Subjects must have measurable lesions (according to and radiologically confirmed disease progression at the time of previous treatment; or CA125 elevated for two consecutive times and 2.5 times upper the limit of normal value； 9. Subject agrees to take blood samples for gBRCA mutations, can provide formalin-fixed, paraffin-embedded tumor tissue samples for sBRCA and homologous recombination deficiency(HRD) detection; 10. Life expectancy>12 weeks; 11. Subject's ECOG physical status score is 0-2; 12. Good organ function, including:Neutrophil count≥1500/μL;Platelets≥100,000/μL;Hemoglobin≥10g/dL;Serum creatinine≤1.5 times the upper limit of normal value, or creatinine clearance≥60mL/min (calculated according to Cockcroft-Gault formula);Total bilirubin≤1.5 times the upper limit of normal value or direct bilirubin≤ 1.0 times the upper limit of normal value;AST and ALT≤2.5 times the upper limit of normal value. When liver metastases are present, it must be≤5 times the upper limit of normal value; 13. For women with fertility potential, if blood test or urine pregnancy test is negative within one week before enrollment, effective contraceptive measures must be taken, such as physical barrier contraceptive method (condom) or complete abstinence. Oral, injectable or implantable hormonal contraceptives are not allowed. Or women without reproductive potential, defined as: I. Natural menopause and menopause for more than 1 year; II. Surgical sterilization (bilateral oophorectomy, bilateral salpingectomy or hysterectomy); III. serum follicle-stimulating hormone, luteinizing hormone, and plasma estradiol levels were within the menopausal of the research center laboratory; 14. Subject is able to adhere to the protocol; 15. The adverse effect of any previous chemotherapy have recovered to ≤ Grade1 (CTCAE v5.0) or baseline levels, except for sensory neuropathy or hair loss with stable symptoms ≤ Grade2 (CTCAE v5.0)  Personnel involved in the formulation or implementation of the research plan; 2. Patient participated in other clinical trails using other experimental drugs at the same time as the study; 3. People who are known to be allergic to Niraparib or Bevacizumab (or active or inactive ingredients of drugs with similar chemical structure); 4. People who are inability to swallow oral drugs and any gastrointestinal diseases that may interfere with the absorption and metabolism of the study drugs, such as uncontrollable nausea and vomiting, gastrointestinal obstruction or malabsorption; 5. Major surgery was performed within 4 weeks before the start of the study or did not recover after the operation; 6. Received palliative radiotherapy of >20% bone marrow 1 week before enrollment; 7. The subjects had other malignant diseases in past 2 years, except skin squamous cell carcinoma, basal-like carcinoma, breast intraductal carcinoma in situ, or cervical carcinoma in situ; 8. Previous or currently diagnosed myelodysplastic syndrome (MDS) or acute myeloid leukemia (AML); 9. Patients with serious and uncontrollable diseases or the general situation of the subjects judged by the researchers to be unsuitable for enrolling the study, including but not limited to: active viral infection, such as human immunodeficiency virus, hepatitis B, hepatitis C, etc.; severe cardiovascular disease, uncontrollable ventricular arrhythmia, myocardial infarction in the last three months; uncontrollable grand mal epilepsy, Unstable spinal cord compression, superior vena cava syndrome or other mental disorders that affect patients to sign the informed consent; hypertension beyond drug control; immune deficiency (except splenectomy) or other diseases that researchers consider may expose patients to high-risk toxicity; 10. The previous history of thromboembolism was defined as: uncontrolled pulmonary embolism, deep venous thrombosis, and other related conditions after anticoagulant therapy for more than 3 months before enrollment; 11. Any medical history or existing clinical evidence indicates that there may be confusion of study results, interference with patients' compliance with the trial protocol throughout the study treatment period, or not in the best interests of patients; 12. Receive platelet or red blood cell transfusions within 4 weeks; 13. Patients who are pregnant or lactation, or who plan to become pregnant during study treatment