Group 1: Eighteen premenopausal female patients with a diagnosis of vitamin D deficient osteomalacia were included in this group. Vitamin D deficiency was diagnosed according to the serum 25 hydroxy vitamin D3 (25OHD) concentrations (< 30 ng/mL). Reasons for vitamin D deficiency were verified as insufficient exposure to sunlight, frequent parturition and prolonged lactation. All of these patients received a standard treatment regimen; oral Vitamin D3 150 000 IU once for all and subsequently 880 IU D3 and 1000 mg calcium carbonate for six weeks. This group was also evaluated after replacement therapy at sixth week.