Evaluate the Effectiveness of Progestin-Primed Versus GnRH Antagonist Protocols in Vietnamese Women Undergoing In-vitro Fertilization

Inclusion Criteria: Women meeting the sample selection criteria are as follows: * Women age 20 to 45 years old. * Infertility due to male factors, fallopian tube factors, or unknown causes. * Undergoing IVF in one COS cycle and intended to apply either GnRH antagonist protocol or PPOS protocol * Voluntary participation in research. Exclusion Criteria: * Any contraindications to ovarian stimulation and IVF/ICSI treatment * Hyperprolactinemia or other endocrine diseases. * Those who took hormone drugs within the past 3 months * Suffering from systemic diseases such as kidney failure, lupus erythematosus, depression, etc. * Abnormal structure of the uterine cavity. * Patients with endometriosis or cancer * Random-start cycles. * Oocyte donation cycles * Perform embryo biopsy.