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OBJECTIVE To evaluate the outcome of oocyte vitrification using the Cryotop method, observed in an egg donation program by simultaneously evaluating embryos derived from vitrified and fresh oocytes coming from the same stimulated cycle. DESIGN Cohort prospective randomized study. SETTING Instituto Valenciano de Infertilidad (IVI) Valencia, Spain. (More)
BACKGROUND Time-lapse observation presents an opportunity for optimizing embryo selection based on morphological grading as well as providing novel kinetic parameters, which may further improve accurate selection of viable embryos. The objective of this retrospective study was to identify the morphokinetic parameters specific to embryos that were capable of(More)
OBJECTIVE To determine the prevalence and the effect of premature luteinization in GnRH antagonist IVF-ET cycles. DESIGN Prospective observational study. SETTING In vitro fertilization-embryo transfer (IVF-ET) program at the Instituto Valenciano de Infertilidad. PATIENT(S) Eighty-one infertile patients undergoing controlled ovarian hyperstimulation(More)
This retrospective longitudinal study was undertaken in order to determine the incidence and reproductive impact of uterine malformations on women desiring to conceive during their reproductive years. A total of 3181 patients in whom the morphology of the uterus was ascertained by hysterosalpingography (HSG) and laparoscopy/laparotomy during the years(More)
BACKGROUND The influence of elevated serum progesterone levels during in vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI) cycles on pregnancy rates is a matter of continued debate among fertility clinicians. Efforts to resolve this question have been impeded by the various assays used to measure progesterone and the different, arbitrary(More)
OBJECTIVE To assess the endocrine, paracrine, and autocrine milieu in patients with endometriosis on the basis of the measurement of several cytokines in serum and follicular fluid (FF) and in vitro culture of granulosa luteal cells. DESIGN Case-control study. SETTING In vitro fertilization program at the Instituto Valenciano de Infertilidad. (More)
BACKGROUND An efficient oocyte cryopreservation method is mandatory to establish a successful egg-banking programme. Although there are increasing reports showing good clinical outcomes after oocyte cryopreservation, there is still a lack of large controlled studies evaluating the effectiveness of oocyte cryo-banking. In this study, we aimed to compare the(More)
OBJECTIVE To analyze the potential role of extraovarian factors such as endometrium in the reproductive outcome of obese patients. DESIGN Retrospective study. SETTING University-affiliated infertility clinic, between January 2001 and July 2005. PATIENT(S) Women undergoing a total of 2656 first ovum donation (OD) cycles with good quality embryos. (More)
Chemokines are implicated in the implantation process. The aim of this study was to investigate mRNA expression and protein levels of chemokine receptors CXCR1, CXCR4, CCR5 and CCR2B in human endometrium throughout the menstrual cycle, during HRT and in the human blastocyst. The regulation of chemokine receptors in the endometrial epithelium was also(More)
OBJECTIVE To assess the outcomes achieved after Cryotop vitrification of both early cleavage and blastocyst-stage embryos and to determine whether the embryo developmental stage and embryo quality as well as the origin of the embryos (ovum donation cycles, patients' own oocytes) and the endometrial preparation for the embryo transfer had any effect on the(More)