Leyre Herrero

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OBJECTIVE To investigate differences in ovarian reserve markers (antimüllerian hormone [AMH] and antral follicle count [AFC]) in Indian and Spanish women. DESIGN Cross-sectional study. SETTING In vitro fertilization (IVF) clinics. PATIENT(S) Infertile Spanish (n=229) and Indian (n=236) women who underwent controlled ovarian stimulation for IVF from(More)
The aim of this observational prospective study was to compare multiple embryological and pregnancy outcomes for vitrified oocytes against the same outcomes using vitrified embryos in patients at risk for ovarian hyperstimulation syndrome. Ninety-six patients were included and allocated to vitrification of oocytes (Group 1) or embryos (Group 2). No(More)
In this observational trial, we compared the impact on two different strategies, egg vitrification (n = 152) obtained after triggering final oocyte maturation with GnRH agonists and transferring the embryos at a later stage, with classical coasting (n = 96) to avoid OHSS in patients at risk due to high response to COH. Our results show that oocyte(More)
To assess possible effects on subcellular organization after cryopreservation, we compared vitrified and slowly frozen oocytes in terms of their post-warm/thaw morphology, meiotic spindle configuration, and DNA integrity. DNA integrity of cryopreserved oocytes was not altered after the procedures, but vitrification was more effective than slow cooling, as(More)
BACKGROUND It has been reported that a natural cycle (NC) is similar to or even better than hormone replacement therapy (HRT) in patients with regular cycles who undergo frozen embryo transfer (FET). Hundreds of FETs are managed yearly in our clinic. Scheduling these cycles is critical in a busy unit like ours. This is why we have to prove if a NC really(More)
PURPOSE OF REVIEW To summarize recent advances in oocyte and embryo cryopreservation techniques and outcomes. RECENT FINDINGS Vitrification is gradually replacing slow freezing due to a better survival rate after thawing. Most units use vitrification for both oocyte and blastocyst cryopreservation, as these two biological structures did not perform very(More)
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