Active clinical trials for "Infertility"

The aim of this study is to prospectively examine the relationship of the uterine junctional zone thickness, evaluated by ultrasonography and In Vitro Fertilization (IVF) treatment outcome. The study hypothesis is that the uterine junctional zones of women who did not achieve pregnancy will be thicker than those of the women who do achieve pregnancy

Reduced ovarian reserve and the consequent poor ovarian response are very recurent in infertile patients, indeed a percentage of 10%-24% of couples addressed to infertility program may be classified as Poor Ovarian Responder (POR). Objective: To evaluate whether the repeated luteal phase stimulation (Second Step) permits a significantly higher number of oocytes retrieved in POR when compared to conventional follicular stimulation. Interventions: The follicular phase stimulation is conduced according to a standardized Antagonist protocol or Short protocol (with GnRH agonist) using recombinant or urinary gonadotropins (starting dose 300 or 450 UI) or a long lasting recombinant gonadotropin (Corifollitropin alfa 150 mcg). Two - six days after the first oocyte retrieval a second gonadotropin stimulation will be started with a GnRH antagonist protocol (the stimulation will be started with 250 UI of human menopausal gonadotropin (hMG) and a GnRH antagonist (GnRH-an) 0,25 mg\die will be administered when the leading follicle is ≥ 14 mm until hCG (human chorionic gonadotropin) criteria are met. When at least two follicles had reached 17-18 mm in diameter, ovulation will be triggered with a single subcutaneous bolus of urinary human chorionic gonadotropin (10.000 UI ) and oocyte retrieval will be performed after 35 hours. Two or Three months after the second oocyte retrieval the Embryo transfer (ET) will be performed after endometrial preparation with Estradiol Valerate and intramuscular Progesterone.

Does vitamin D is more deficient in women with unexplained infertility than in fertile pregnant women or not?

To investigate the prevalence of psychological symptoms and sexual dysfunction, and to estimate their possible interactions in infertile men.

Dropout rates for fertility treatments are high. This study will examine the rate of patients that drop out during any type of subfertility work up or treatment. Furthermore, we will determine what reasons for discontinuation are and we will identify the demographic characteristics of the couples and the prognostic factors for drop out during assessment or treatment at a Fertility Centre in the Isala (Zwolle), Erasmus University Centre (Rotterdam), Elisabeth Twee Steden Hospital (Tilburg), Reinier de Graaf Group (Voorburg), St Antonius Hospital (Nieuwegein), Maxima Medical Centre (Veldhoven) and Noordwest Hospital Group (Den Helder/Alkmaar) in The Netherlands.

Over the past several decades, considerable effort has been expended toward the successful cryopreservation of various human cells. While attempts at cryopreservation have been directed at different tissue types, one of the most vigorously pursued targets has been reproductive tissue. Historically, cryopreservation of human sperm has existed for several decades. The earliest reports of pregnancies (Trounson et al., 1983) and births (Zeilmaker et al., 1984) from the cryopreservation of human embryos occurred in the early 1980s. Presently, the freezing and storage of human embryos following in vitro fertilization (IVF) is standard practice at most fertility clinics. In 2003, the CDC Assisted Reproductive Technology success rates report stated that 4,246 live births occurred out of 17,517 non-donor frozen embryo cycles. . Because the human egg is a relatively voluminous cell with abundant cytoplasm, crystallization at the time of freezing may result in damage to the organelles. Secondly, a mature metaphase II oocyte contains a fragile spindle apparatus involved in cleavage. The purpose of this research study is to evaluate a method of freezing and thawing oocytes. This evaluation will be made by comparing the survival rates and rates of fertilization, cleavage and embryo quality of fresh oocytes and frozen-thawed oocytes which will be inseminated during the IVF (in vitro fertilization) treatment cycle. In addition, the same comparisons will be made between frozen oocytes from infertile women and those of egg donors. You are being asked to be in this study because you are currently undergoing in vitro fertilization.

Hysteroscopy has now become a gold-standard technique carried out for uterine cavity assessment in infertile women. Apart from direct visualizing of the endometrium by the naked eye, pathologies missed by other modalities of investigation can be picked up and managed appropriately. Unfortunately, the procedure itself is not free from complications e.g. perforation, cervical laceration, bleeding, limited access in cases of cervical stenosis and considered as an invasive procedure. Two-dimensional transvaginal ultrasonography (2D-TVS)and Three-dimensional TVS (3D-TVS) are non-invasive methods for evaluating the uterine cavity. The3D-TVS is superior to 2D-TVS in identifying uterine cavity abnormalities due to its ability to obtain a view of three different planes of the uterus, which could be used to locate the position of intracavitary pathology. Reports vary regarding the diagnostic accuracy of 3D-TVS that was reported to have 41.3-81.5% sensitivity and 94.6-98.7% specificity. So it became clear that 3D-TVS is a non-invasive and safe diagnostic tool for evaluation of the uterine cavity abnormalities but its sensitivity, specificity and accuracy still a matter of debate and warrants more evaluation.

A randomized prospective study in the evaluation of the long acting GnRH antagonist Degarelix against the classical multidose regime with Ganirelix for LH suppression during the follicular phase of an ovarian stimulation cycle in oocyte donors.

The relationship between revelation of mode of conception and child behavior is not known

To evaluate the influence of lead (pb) and cadmium (cd) seminal plasma level on embryo development and pregnancy rate during intracytoplasmic sperm injection (ICSI).