CHANGES IN SERUM 25 – HYDROXYVITAMIN D [25(OH)D] LEVELS FOLLOWING TREATMENTFOR VITAMIN D DEFICIENCY IN PREGNANT WOMEN AT HAI PHONG OBSTETRICS AND GYNECOLOGY HOSPITAL, FROM 2024 TO 2025. YHCĐ [Internet]. 2026 Sept. 19 [cited 2026 Sept. 19];67(CD14). Available from: https://tapchiyhcd.vn/index.php/yhcd/article/view/6458