Uterine vascularity during stimulation and its correlation with implantation in in-vitro fertilization.

摘要: The changes in uterine artery blood flow women undergoing in-vitro fertilization cycles were studied throughout stimulation after gonadotrophin-releasing hormone (GnRH) desensitization. data obtained showed that the vascularity was related to hormonal changes. GnRH agonist effect seen only third week of administration, and perfusion significantly (P = 0.002) improved by oestradiol secretion. Human chorionic gonadotrophins increased resistance index (RI) 0.0001) for a period 48 h. Then progesterone secretion modified curve with significant improvement 0.03). Comparison RI value 2 days before human menopausal gonadotrophin (HMG) commencement, patients without pregnancy, higher who did not conceive but no difference observed on day embryo transfer. pregnancy rates similar whatever range observed. available so far suggest haemodynamic parameters alone, detected Doppler sonography, do provide full information endometrial receptivity A > 0.79 HMG commencement seems indicate poor may necessitate an increase doses prevent immaturity.