Ong , Q. T.; Huynh , T. L.; Lam , D. T.; Van , T. C.; Quan , K. P.; Nguyen, T. T.; Le , M. T. EVALUATION OF CERVICAL PESSARY AND PROGESTERONE IN PRETERM BIRTH PREVENTING AT 16-28 WEEKS GESTATION AT CAN THO GYNECOLOGY OBSTETRICS HOSPITAL IN 2022-2024. CTJUMP 2024, 112-118.