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Updated: Jul 15, 2026

Fertility Preservation Through Oocyte Vitrification: Clinical and Laboratory Perspectives
Published on: September 16, 2021
Does physicians' experience influence in vitro fertilization success in patients undergoing controlled ovarian
Raoul Orvieto1, Jacob Rabinson, Simion Meltcer
1Department of Obstetrics and Gynecology, Barzilai Medical Center, Ashkelon, and Ben Gurion University School of Medicine, Beer Sheva, Israel. raoulo@barzi.health.gov.il
Abstract:
In an attempt to examine whether physicians' experience may influence IVF outcome in patients undergoing GnRH antagonist (GnRH-a) controlled ovarian hyperstimulation (COH) protocols, we studied 273 consecutive patients, with a favorable prognosis a priori, admitted to our IVF unit, of whom 88 conceived. The highest pregnancy rate (PR) (46.5%) was observed in patients achieving, on day of hCG administration, an E(2)-to-follicle ratio <100 pg/mL. The timing of hCG administration is crucial in patients undergoing the GnRH-a COH for IVF to optimize success rate.
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