U.S., March 14 -- ClinicalTrials.gov registry received information related to the study (NCT06875752) titled 'Is There a Need for Luteal Support in Modified Natural Cycle Frozen Embryo Transfer Cycles' on March 05.
Brief Summary: Without progesterone there is no pregnancy. Following ovulation, the endocrine function of the follicle changes and progesterone replacing estradiol becomes its main secretory product. In the follicular phase the increasing amount of estradiol secreted by the growing follicle builds up the endometrium, while in the luteal phase progesterone, the main product of the corpus luteum, prepares the endometrium for implantation. This process is called decidualization. If implantation occurs, human chorionic gonadotropin ...