Flow Index Vascularization dynamics in the preovulatory phase of controlled ovarian hyperstimulation: Profile and relationship with conception rate [Dynamique de l'index de vascularisation et de flux dans la phase préovulatoire de l'hyperstimulation ovarienne contr?lée. Relation avec le taux de conception]

摘要

Objectives: To study the evolution of subendometrial vascularization flow index (VFI) in controlled ovarian hyperstimulation (COH + IIU) cycles and compare its dynamic changes in pregnant and non pregnant women. Patients and methods: This is a retrospective study on 61 couples. To determine the profile of IVF just before ovulation, patients had 3D-Power Doppler angiography (3D-PDA) in this precise preovulatory phase. Results: We observed a decreasing profile of VFI in 52% (32/61) of the main group cycles, in 45% (14/31) of the subgroup with spontaneous peak of LH (luteinizing hormone), and in 60% (18/30) of the hCG (human chorionic gonadotropin) trigger subgroup. There were ten conceptions, (10/61, 16.4%), including eight (8/32, 30%) that were associated with a decreasing profile of VFI versus two (2/29, 7%) that were associated with an increasing profile (NS). In the detection of LH peak subgroup, we observed five conceptions (5/14, 36%) associated with a decreasing profile versus one conception (1/17, 6%) associated with an increasing profile of VFI (OR: 8.3; confidence interval [CI] 95%: 0.8-444; P = 0.06 in favor of a of decreasing VFI profile). In the hCG subgroup, there were three conceptions in the decreasing VFI profile (3/18, 17%) and one conception with increasing VFI (1/12, 17%, P = 0.6). Discussion and conclusion: In controlled ovarian hyperstimulation, a decreasing VFI profile is more common compared to an increasing one. Such au profile seems to be associated with a higher conception rate in cycles with spontaneous LH surge.