A Phase 3 Study to Compare Biosimilar Denosumab With Prolia®

Inclusion Criteria:

1. Willing to provide voluntary written informed consent and able to comply with theprotocol requirements
2. Postmenopausal women aged ≥ 55 and ≤ 85 years
3. Body weight ≥ 50 kg and ≤ 90 kg
4. Diagnosed with osteoporosis, with absolute BMD at the lumbar spine (L1-L4 region) asmeasured by dual-energy X ray absorptiometry (DXA) at screening
5. At least 5 years of postmenopausal status confirmed by follicle-stimulating hormone (FSH) levels at screening
6. At least one hip joint and two vertebrae in L1-L4 region evaluable by DXA
7. No other clinically significant medical history, vital signs, physical examination,laboratory profiles as deemed by the Investigator or designee

Exclusion Criteria:

1. Known hypersensitivity to denosumab or any of the excipients of the study drug
2. Known intolerance to, or malabsorption of calcium or vitamin D supplements
3. Previous exposure to Prolia® or any other denosumab biosimilar
4. Previous use of oral bisphosphonates
5. Use of intravenous bisphosphonates within the past 5 years prior to screening
6. Use of parathyroid hormone or its derivatives, systemic hormone replacement therapy,selective estrogen-receptor modulators, or tibolone or calcitonin within 12 monthsprior to enrollment
7. Any prior use of fluoride or strontium
8. Systemic glucocorticoids (≥ 5 mg prednisone equivalent per day or cumulative dose ≥ 50mg) for more than 10 days within 3 months prior to enrollment (topical and inhaledcorticosteroids are allowed)
9. Other bone active drugs (i.e. drugs affecting bone metabolism) including heparin,anti-epileptics (except for benzodiazepines and pregabalin), systemic ketoconazole,adrenocorticotrophic hormone (ACTH), lithium, protease inhibitors,gonadotropin-releasing hormone (GnRH) agonists, or anabolic steroids within the past 3months prior to screening
10. Known sensitivity to drug products derived from mammalian cell lines
11. History of one severe or more than two moderate vertebral fractures per Genantclassification as determined by the central reading center
12. History of hip fracture or bilateral hip replacement
13. Total hip or femoral neck T-score <-4.0
14. History and/or presence of atypical femoral fracture
15. Presence of any active healing fracture according to the Investigator's assessment
16. History of any transplant or chronic immunosuppression (including patients onimmunosuppressive therapy)
17. Severe liver dysfunction
18. Positive testing for hepatitis B (hepatitis B virus surface antigen [HbsAg]) orhepatitis C (hepatitis C virus antibody [HCV Ab]) virology
19. Known history of human immunodeficiency virus (HIV) infection or positive serology forHIV at screening
20. Significantly impaired renal function or receiving dialysis
21. Oral or dental conditions
22. Major surgery within 8 weeks prior to screening or anticipated major surgery duringthe study
23. Clinically significant leukopenia, neutropenia, or anemia as determined by theInvestigator or any other clinically significant medical condition or laboratoryabnormality that, in the opinion of the Investigator, would pose a risk to patientsafety or interfere with adherence to study procedures, study completion, or theinterpretation of study results
24. Patient with an active infection or history of infection
25. Suspected signs and symptoms of COVID-19/confirmed COVID-19 or with recent history oftravel/contact (less than 2 weeks from screening) with any COVID-19 positivepatient/isolation/quarantine