“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” (2026) Vietnam Journal of Community Medicine, 67(CD14). doi:10.52163/yhc.v67iCD14.6458.