 This randomized controlled trial will evaluate the appropriate dose of Vitamin D required to maintain Vitamin D sufficiency amongst Indian and Malay PMO women. The study will last for six months. 150 PMO women of Indian and Malay ethnicity will be randomly allocated into 3 different dosing regimens i.e. a 25 000 IUmonthly 900 IUday, b 50 000 IUmonthly 1800 IUday and c 50 000 IUfortnightly 3300 IUday. Each group will be containing an equal amount of Indian and Malay Individuals. Subjects will be recruited from the osteoporosis clinic at UMMC. 