Human Reproduction, Vol 12, 1240-1245, Copyright © 1997 by Oxford University Press
S Bassil, C Wyns, D Toussaint-Demylle, M Nisolle, S Gordts and J Donnez
The role of transvaginal pulsed colour Doppler ultrasound in the assessment
of ovarian vascularity was studied in 196 in-vitro fertilization (IVF)
cycles. The changes in ovarian blood flow after gonadotrophin-releasing
hormone agonist (GnRHa) down-regulation and human menopausal gonadotrophin
(HMG) stimulation were determined. The data obtained showed that the
ovarian blood flow was significantly improved by oestradiol secretion (P =
0.05) and human chorionic gonadotrophin (HCG) administration (P = 0.003).
Folliculogenesis was affected by blood flow supply. The resistance index
(RI) value was significantly different (P = 0.05) according to the duration
of ovarian stimulation. Patients with a mean RI value >0.56 had a longer
stimulation with a significantly lower mean number of oocytes retrieved (P
= 0.01) despite the administration of a standard dose of HMG. The RI value
is a good indicator of modifications in ovarian vascularization during
stimulation. Doppler blood flow measurement could be used to determine the
optimal timing for the beginning of HMG administration in patients
undergoing ovarian stimulation after down-regulation for IVF treatment.
ARTICLES
The relationship between ovarian vascularity and the duration of stimulation in in-vitro fertilization
Department of Gynecology, Catholic University of Louvain, Cliniques Universitaires St Luc, Brussels, Belgium.
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