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Showing 1-20 of 22 trials
NCT05588635
Nowadays, frozen-thawed embryo transfers (FET) are expending. This practice avoids risk of ovarian hyperstimulation syndrome (OHSS), as well as allowing better synchronization between endometrium and embryo, which is fundamental for pregnancy. There are several FET protocols, including hormonal replacement therapy cycle (HRT), which enable clinicians to adapt the day of embryo transfer. However, increase in spontaneous miscarriages was observed with this latter protocol compared to fresh embryo transfers and the other endometrial preparations (natural and stimulated), in relation with the lack of physiological corpus luteum. Then, Clinicians interrogate about measuring serum progesterone in order to adjust their treatment and/or transfer date. Various studies have shown thresholds below and/or above which pregnancy or live birth rate were lowered. The main objective is to find a serum progesterone threshold on the day of embryo transfer above which live birth rate is increased. The secondary objectives are to analyze the factors associated with increased serum progesterone on the day of transfer, to analyze the miscarriage rate, and impact of change on luteal phase support on day 12.
NCT05198128
the incidence of OHSS and clinical outcomes after calcium IV infusion in high-risk women undergoing ART
NCT04797338
Gonadotropin Releasing Hormone agonist (GnRHa) triggering is used as an alternative to human chorionic gonadotropin (hCG) in GnRH antagonist protocol to eliminate the risk of ovarian hyperstimulation syndrome (OHSS). However, its main disadvantage is a significantly lower pregnancy rate, hypothesized to result from a process called "luteolysis" (demise of the corpora lutea). In order to preserve a high pregnancy rates, several luteal support regimens were investigated, including an intensive estrogen and progesterone supplementation and a daily GnRHa treatment. However, no study, so far, compared the efficacy of these two regimens. Our aim is to compare the efficacy of GnRHa versus estrogen and progesterone supplementation for luteal phase support in high responders following GnRHa triggering.
NCT04351126
lines of evidence that support nature of ovarian hyperstimulation syndrome (OHSS) as "defective mineralocorticoid response" are cited, our hypothesis is tested clinically in both prophylaxis against and treatment of OHSS.
NCT01606709
The purpose of this study is to compare gene expression profiles in endometrial biopsies during the window of implantation after triggers of oocyte maturation using GnRH agonist or hCG and compared with their natural cycles in order to identify genes that may be dysregulated in GnRH agonist-triggered cycles. The investigators also intend to evaluate patients feeling of well being and physical quality of life after GnRH agonist trigger compared with hCG trigger.
NCT01815138
This a prospective randomized double blind study involving patients at high risk of OHSS development with peak serum E2 levels \< 4,000 pg/ml comparing the ongoing pregnancy rates in patients who receive adjuvant hCG 1,000 IU at the time of GnRH agonist trigger or adjuvant hCG 1,500 IU 35 hours after GnRH agonist trigger.
NCT02620605
Study the effect of early cabergoline administration in prevention of occurrence or decreasing the severity of OHSS in patients undergoing intra cytoplasmic sperm injection.And its effect on oocyte maturation,fertilization and pregnancy rate..
NCT01500863
Conventional luteal phase support after human chorionic gonadotrophin (hCG) triggering in women undergoing in vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI) provides adequate pregnancy rates and live birth rates, but Ovarian hyperstimulation syndrome (OHSS) still occurs in 1-3% of the patients. If gonadotropin-releasing hormone agonist (GnRHa) are used instead of hCG, OHSS does not occur, but clinical results are somehow diminished. By testing different luteal support protocols on women undergoing GnRHa triggering, the investigators aim to find out which protocol resembles the most the gene expression profile observed after hCG triggering and conventional luteal phase support, in order to choose it as the most adequate in terms of endometrium receptivity and safety (OHSS incidence).
NCT02846493
This prospective, randomized, controlled clinical trial will evaluate the effect and security of dexamethasone prevention for Patients of Ovarian Hyperstimulation Syndrome.
NCT01979341
The use of antagonist controlled ovarian stimulation protocols has allowed the use of GnRH agonist to be used for final oocyte maturation. The use of GnRH agonist as ovulation trigger has been shown to reduce the risks for ovarian hyperstimulation syndrome (OHSS), but its sole use results in reduced embryo implantation due to luteal phase insufficiency. The combination of GnRH agonist and variable doses of hCG for final oocyte maturation has been shown to overcome the luteal phase insufficiency effecting endometrial receptivity. In this study the investigators will test the hypothesis that using GnRH agonist (0.2mg Triptorelin) and a full dose of hCG (6500IU Ovitrelle) for final oocyte maturation in normoresponders will increase oocyte maturity, embryo quality and embryo implantation and reduce ovarian hyperstimulation syndrome, as compared to the traditional hCG (full dose) alone trigger.
NCT01109888
Coasting is one of the means to reduce the risk of OHSS for patients at risk for severe OHSS. During coasting gonadotrophin administration is withheld until serum E2 levels drop to a range considered safe. Prolonged coasting reduces the chance for implantation and pregnancy. The aim of the study is to explore whether an increased dose of GnRH Antagonist will shorten the coasting period without an adverse effect on cycle outcome.
NCT01009567
The purpose of this study is to investigate the efficacy and safety of cabergoline in prevention of ovarian hyperstimulation syndrome versus albumin in ART program.
NCT02329483
This study aims to predefine the threshold FSH doses during the early follicular phases in low- dose step-up ovulation induction cycles used to treat anticipated high responders by monitoring total testosterone and androstenedione blood levels. The blood levels of total testosterone and androstenedione levels will be measured in patients at the starting day and at every control day when vaginal sonographic folliculometries and blood estradiol measurements are made. Hence, we are aiming to define an early monitoring parameter by which we will be able to define a follicular response to treatment before estradiol rise or apparently selected follicular growth.
NCT02392520
The study aims to compare the novel method of GnRH antagonist administration in the luteal phase versus conventional treatment in IVF patients who develop severe early ovarian hyperstimulation syndrome and have all their embryos cryopreserved.
NCT00867659
This pilot study aims to address whether the prophylactic use of Cetrorelix Acetate after a long gonadotropin-releasing hormone (GnRH) agonist protocol post-hCG (human chorionic gonadotropin) administration can significantly reduce the incidence of OHSS in oocyte donors.
NCT00835523
The aim of the study is to explore the concept of GnRH-agonist triggering in combination with elective cryopreservation of all 2PN oocytes at larger scale in a pragmatic clinical setting. The question asked is: "Does GnRH-agonist triggering and cryopreservation work", in terms of efficacy and safety, when applied to a larger cohort of patients, and by a number of different centres with different clinical routines.
NCT01569256
Cabergoline prevents ovarian hyperstimulation syndrome in high risk patients by disrupting follicular fluid hormone microenvironmentally altering the follicular fluid levels of insulin like growth hormone -I (IGF-I), antimullerian hormone (AMH), inhibin B and hepatocyte growth factor (HGF) levels in women with PCOS and high risk of ovarian hyperstimulation syndrome (OHSS).
NCT00617864
This research study was designed to look at the effect of human albumin transfusion on circulating levels of Vascular Endothelial Derived Growth Factor (VEGF), a protein that is believed to be responsible for the syndrome of ovarian hyperstimulation. Patients have been asked to participate because they are identified as at risk for the Ovarian Hyperstimulation Syndrome (OHSS), a potentially serious complication of in vitro fertilization. It has been established that the onset of OHSS may be preventable by the infusion of albumin at the time of egg retrieval; however, we do not know by what mechanism albumin works. As we know the pathogenesis of OHSS is related to VEGF released from the ovaries, we believe human albumin may serve to "bind up" this VEGF and prevent it from causing its harmful effects. The purpose of this study is to evaluate the effect of albumin infusion on blood and urine VEGF levels in these patients.
NCT01477970
The possibility to prevent the early ovarian hyperstimulation syndrome (OHSS) by doubling the daily dose of GnRH-antagonist in women stimulated with the antagonist protocol who are at risk for OHSS was evaluated. Thirty-eight women of a study group who underwent ovarian stimulation using the GnRH-antagonist protocol and might have had their cycle cancelled because of OHSS were compared to 76 women of a control group. All cases of the study group were IVF women presenting a rapid rise of E2 ≥ 3500 pg/ml on the 7th day of stimulation or later while the follicles (\> 12mm) were \> 15 in total and the biggest one was ≤ 16mm in diameter. By decreasing the rFSH dose to 100IU a day and adding an additional dose of GnRH-antagonist (0.25 twice a day), estradiol levels were lowered or reached a plateau before hCG was given. A marked decrease or plateau of estradiol levels was observed the day of oocyte retrieval while the pregnancy rate was not adversely affected when compared with an optimum ovarian response cycles. None of the women were cancelled or developed OHSS. In overresponding IVF cycles, doubling the usual GnRH-antagonist daily-dose during the ovarian stimulation, the estradiol rise could be blocked while a minimal follicular stimulation may continue without the risk of OHSS or adversely affect pregnancy rate.
NCT00119925
The purpose of this study is to compare two different strategies to implement the existing Guideline programme on Subfertility, as issued by the Dutch Society of Obstetrics and Gynaecology (NVOG). Therefore, an innovative patient-directed strategy will be compared to a control strategy and effectiveness, costs and feasibility of both strategies will be assessed.