View clinical trials related to IVF.
Filter by:This is a study designed to validate Kawamura´s theory and investigation of activation of primordial follicles through ovarian cortex fragmentation. Our aim is to evaluate embryo quality following this procedure in poor ovarian responders and patients with decreased ovarian reserve. Secondary objectives are to assess potential association with the number of oocytes retrieved and pregnancy rates after IVF.
Management of Thin endometrium in IVF is challenging. Thin endometrium is often defined as <7 mm or < 8 mm on the day of Human Gonadotropin administration(Bu and Sun, 2015; Wu et al., 2014). Its incidence is 1-2.5% in most studies ( AlGhamdi et al.,2008). Endometrial thickness and endometrial vascularity is closely linked to endometrial receptivity.Improving endometrial receptivity is a predictor of the success in IVF. Many medications have been tried to improve endometrial thickness as Aspirin,sildenafil citrate,luteal estradiol and Granulocyte colony stimulating factor. Nitric oxide (NO) is a key signaling molecule involved in the vasodilator response of smooth muscle cells. NO activates the cyclic guanosine monophosphate (cGMP)/protein kinase G (PKG) pathway within smooth muscle cells to promote smooth muscle cell relaxation. Sildenafil citrate inhibits phosphodiesterase 5 (PDE5) maintaining activation of cGMP and PKG and maximizing the effect of existing NO, thus facilitating smooth muscle cell relaxation. The potent vasodilator action of sildenafil has led researchers to evaluate sildenafil as a treatment in assisted reproduction where low uterine blood flow is perceived to be a contributor to implantation failure (Fairouzabadi et al.2013). The investigators aim at this study to investigate the role of sildenafil citrate on endometrial and subendometrial vasculature in women with thin endometrium undergoing Frozen-Thawed IVF cycles.
This study aims to evaluate whether allowing unprotected vaginal intercourse 24 hours after frozen embryo transfer will result in higher ongoing clinical pregnancy rates in comparison to having participants abstain from unprotected vaginal intercourse until pregnancy test (10-14 days after frozen embryo transfer).
Women with intramural myoma not reaching the endometrial cavity will be randomized to either open myomectomy or no intervention . The participants will be assessed through full history-taking with special consideration to age and the duration, type, and cause of infertility. The medical examination included general, abdominal, and vaginal examinations. Finally, an ultrasonography examination was performed to check for the presence of three or more preantral follicles and to exclude ovarian cysts. On day 3 of a natural cycle, a baseline levels of FSH, luteinizing hormone (LH), , estradiol and anti-Müllerian hormone (AMH).Ovarian stimulation was performed using a long, antagonist, or short protocol. They were assigned to one of the 2 groups according to having an intramural myoma not indenting the cavity or not. All will be followed up by transvaginal ultrasonography . When two or more follicles had reached a mean diameter of 18 mm, oocyte maturation was triggered by intramuscular administration of hCG. Embryo transfer will be done at day 2, 3 or 5 according to the circumstances.
The effects of gender transitioning, particularly the effects of testosterone exposure in transgender men, on the oocyte and embryo development are largely unknown. Based on prior studies suggesting that the extracellular RNAs secreted by the ovarian follicle cells reflect the oocyte and embryo biological state, the investigators propose to use these extracellular RNAs to gain insights into the effects of testosterone exposure in transgender men on their oocyte and embryo without impacting the clinical IVF process.
Identification of the embryo with the highest potential to implant and establish an ongoing pregnancy is a primary aim in human assisted reproduction. This task is undertaken every day by embryologists worldwide during the treatment of couples that wish to conceive by IVF. The optimal scenario is the transfer of a single embryo which gives rise to a singleton pregnancy. The current limitations in determination of embryos that have the highest implantation potential probably contribute to the low rates of pregnancy during IVF treatments. Hence, since the beginning of IVF, how to improve embryo selection has been a 'hot research topic.' Morphology has been a very obvious parameter to assess embryos as it provides a chance to evaluate them from the oocyte stage all the way to the blastocysts stage. Hence, in the first era of IVF, there were number of studies that evaluated this parameter and associated morphology with IVF success rates. On the other hand, it has been previously stated that the slight increase in pregnancy rates during IVF treatment is mostly likely a result of better practices in laboratory than morphological evaluation. Due to the limitations of morphological evaluation, several researchers have investigated adjunctive non-invasive approaches for the assessment of the embryo, such as the metabolomic profiling. Recently mass spectroscopic (MS) approaches have been utilized in limited settings. Samples needed minimal preparation; analytical analysis was rapid and large amounts of data was available. Hence, MS might be a promising approach for metabolomic profiling of embryo culture media.
Optimizing in vitro fertilization (IVF) success is more important than ever, in light of new public funding of IVF in Ontario, Canada. In patients undergoing IVF using gonadotropin-releasing hormone (GnRH) analogues, the luteal phase appears to be compromised, which may be a result of controlled-ovarian hyperstimulation, significant fluctuations in hormone levels, the impact of the oocyte retrieval process, or direct compromise of the corpus luteum. Progesterone support is definitely necessary during the luteal phase to facilitate implantation but whether estrogen supplementation is also needed remains unclear. The present study aims to determine whether estradiol support during the luteal phase improves clinical pregnancy rate in patients undergoing IVF.