 | HUMAN FERTILITY AND REPRODUCTION: THE OOCYTE, THE EMBRYO, AND THE UTERUS
Copyright © 2001 by the New York Academy of Sciences
description
Annals of the New York Academy of Sciences 943:64-67 (2001)
© 2001 New York Academy of Sciences
Perifollicular Vascularity and Its Relationship with Oocyte Maturity and IVF Outcome
ANDREA BORINIa,
ANDREA MACCOLINIa,
ALESSANDRA TALLARINIa,
MARIA ANTONIETTA BONUa,
RAFFAELLA SCIAJNOa AND
CARLO FLAMIGNIb
aTecnobios, Center for Reproductive Health, 40125 Bologna, Italy
bFirst Clinic of Obstetrics and Gynaecology, Department of Obstetric and Gynaecology, University of Bologna, Bologna, Italy
Address for correspondence: Andrea Borini, M.D., Director Tecnobios, Center for Reproductive Health, Via Dante 15, 40125 Bologna, Italy. Voice: +39 051 2867511; fax: +39 051 2867512.
borini{at}tecnobios.it
New markers of embryo ability to implant are pursued continuously. Understanding whether an oocyte is really "mature," that is, ready to be fertilized, would be of great help in choosing an embryo that will implant. It is usual to pay attention to the phase of meiosis, considering the extrusion of the polar body (metaphase II) to be the only sign of the maturity of the oocytes. Nevertheless, understanding more about how the cytoplasm contributes to an oocyte's competency also shows promise as a method of predicting which embryos will implant. Some studies about perifollicular vascularity have demonstrated that embryos originating from oocytes developed in well-vascularized follicles have a higher implantation rate than those originating from oocytes developed in follicles with poor vascularization. Here, we report our results from a preliminary study in which embryos were transferred according to the degree of vascularization of the follicle. Women who received embryos originating from oocytes developed in well-vascularized follicles had a statistically higher pregnancy rate than women who received embryos deriving from oocytes grown in more poorly vascularized follicles (34% vs. 13.7%).
Key Words: perifollicular vascularity • oocyte maturity • implantation rate • power Doppler imaging
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