5. FACTORS PREDICTING PREGNANCY OUTCOMES IN PATIENTS UNDERGOING DAY-5 FROZEN EMBRYO TRANSFER CULTURED WITH THE TIMELAPSE SYSTEM AT HANOI OBSTETRICS AND GYNECOLOGY HOSPITAL. YHCĐ. 2025;66(CĐ2-NCKH). doi:10.52163/yhc.v66iCĐ2.2188