View clinical trials related to IVF.
Filter by:The five proteins of the ITI (Inter-α-trypsin inhibitor) family, are essential components of the extracellular matrix, the dynamics of which they participate in the processes of cellular differentiation and proliferation. I. The ITIH1, ITIH2, ITIH3 and ITIH4 genes seem to be overwhelmingly expressed in the liver, this organ secreting then the corresponding proteins in the general circulation. The only data on ITIH5 indicate that this gene is poorly expressed in the liver and that the major source of its expression is the placenta. In the context of genetic studies on the syndrome of Mayer-Rokitansky-Küster-Hauser (congenital aplasia of the uterus and vagina), the investigators have shown the involvement of ITIH5 and implemented validation experiments of this gene in mice. The investigators have shown that the production of ITIH5 by the uterus varies greatly depending on the physiological state of this organ, especially during pregnancy and the estrous cycle. The investigators also found that most of the production ITIH5 was located in the uterus. Therefore, the serum dosage of ITIH5 could be used clinically as a new biological marker specific to the uterus. This non-invasive biological marker could thus assist in the diagnosis and the understanding of uterine pathologies. ITIH5 rate being correlated to endometrial proliferation, its dosage could be an early and non-invasive marker of endometriosis. The peak of production of ITIH5 by the uterus at the time of embryo implantation window indicates that the assay could provide a better assessment of endometrial receptivity to embryo. It then could be a hand tool of diagnosis in some cases of early repeated miscarriages, and secondly, a prognostic tool for embryo implantation in the context of in vitro fertilization. The investigators conducted an initial feasibility study on the serum dosage of ITIH5, which was approved by the ethics committee of the University Hospital of Rennes. This first step has been validated. Now, the project is to perform a quantitative analysis of ITIH5 and to correlate clinical and biological data of relevant pathological and physiological situations. This project was the subject of a national and international patents of which the University Hospital of Rennes is promoter.
Study if supporting luteal phase of high responder (high egg production or high Estradiol level) long Gn_Rh agonist protocol ICSI/IVF cycle by combined Estradiol and progesterone impairs or improves outcome in terms of pregnancy and implanation rates.
Estradiol is synthesized by granulosa cells of ovaries under control of follicle-stimulating hormone (FSH) and luteinizing hormone (LH). It is known that Estradiol plays a crucial role in maturation and fertilization of oocytes. Furthermore it is involved in development of secondary female sexual organs, fertility and maintenance of pregnancy. Estradiol influences these processes by binding to estradiol receptors (ER). They are ligand-depending transcription-factors. In humans there are two subtypes: ERa and ERb, which are synthetized from gene ESR1 on chromosome 6 and ESR2 on chromosome 14. Both subtypes are expressed in the ovary. Both genes are polymorph. Especially for ERa subtype several polymorphisms and mutations are known which can be linked to breast cancer, spontaneous abortions, osteoporosis and the point in time of menarche. Furthermore some studies have shown a relationship between certain polymorphisms and the risk of infertility associated gynecological malfunctions and the result of IVF treatments. Progesterone is a hormone which plays a crucial role in initiation and maintenance of pregnancy. It induces the transformation of the endometrium, which facilitates the implantation of the fertilized oocyte and supports the pregnancy. Progesterone acts by binding to its receptor. The gene for this receptor is polymorph within the population, whereas some variants seem to account for implantation failure of embryos. In the investigators study the investigators will analyse the role of ERP and PRP polymorphisms in the context of IVF treatment. The analyzed genotypes are two polymorphisms of ESRI, called Pvu and Xba, as well as a variant of ESRII, ER2. In the progesterone receptor gene a single nucleotide exchange at position +331 (G->A) plays a role. The parameters correlated with are concentrations of estradiol, progesterone and FSH, number of follicles, number of fertilized oocytes and pregnancy rate. The investigators hope to optimize established treatment protocols and to improve the chances of success of IVF treatments depending on the genotype of the patient.
At the time of transfer of frozen/thawed embryos in human IVF/ICSI, patients are randomized between study and control group.In the control group no additional intervention takes place on the embryos to be transferred,in the study group, embryos for transfer are subjected to laser assisted hatching(LAH) following the standard procedure.The LAH procedure lasts two minutes per embryo.