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107 active trials for Infertility Female

Progestin Primed Double Stimulation Protocol Versus Flexible GnRH Antagonist Protocol in Poor Responders

The worldwide prevalence of primary and secondary infertility is estimated at ~2% and 10.5%, respectively, among women aged 20-44 years and attempting to conceive. These women may enter an IVF program and be classified as poor prognosis patients for several distinct causes (e.g. advanced maternal age, low ovarian reserve). proper tailoring of the ovarian stimulation protocol to maximize the number of oocytes collected represents a crucial step for them to eventually conceive . Recent evidence indicates that in the same menstrual cycle, there are multiple follicular recruitment waves. This is in accord with the theory that folliculogenesis occurs in a wave-like fashion. Thus, within a single menstrual cycle, there can theoretically be multiple opportunities for a clinician to collect oocytes, as opposed to the conventional single cohort of antral follicles during the follicular phase . Utilizing this concept, reproductive endocrinologists have been attempting to retrieve oocytes from poor responders using both the follicular-phase stimulation (FPS) and the luteal-phase stimulation (LPS) protocols in order to increase the number of oocytes collected shorter period of time. The number of oocytes collected in IVF is a robust surrogate outcome for clinical success since there is a clear relationship between the number of oocytes collected and live birth rates across all female age groups. which protocol is the most effective remains controversial and the efficacy of PPOS in POR compared with that of conventional protocols is unclear.

Start: September 2020
Recombinant LH Prior to Ovarian Stimulation in Poor Ovarian Responders (PRE-LH)

Controlled ovarian stimulation (COS) is one of the first stages of assisted reproductive treatment. The goal is to mimic the ovarian cycle while stimulating the ovaries to overproduce eggs capable of being fertilized, thus maximizing the chances of reproductive success. The stimulation phase involves the use of different hormonal medications but requires tests to check the development of follicles, and hormonal adjustment to get the optimal ovarian response to stimulation. However, between 9 to 24% of patients fail to respond adequately to standard stimulation protocols, resulting in Poor Ovarian Response (POR). In addition to the low oocyte production, POR results in a restricted number of good quality embryos with appropriate implantation potential, suggesting a compromised oocyte quality. POR is one of the most challenging problems in reproductive medicine. Poor responders are difficult to treat since their response to stimulation tend to be deficient even when using different drugs or protocols. In recent years, different therapeutic alternatives have been proposed for these patients. However, to date, the optimal stimulation protocol has not yet been described and oocyte donation is often offered as their only option to achieve pregnancy. Recently, evidence has emerged that supplementation with a specific hormone, luteinizing hormone (LH), during or prior to COS could lead to improved reproductive outcomes in poor responders by increasing the number of oocytes retrieved and improving their quality. The present study aims to evaluate the effect of the treatment with LH prior to COS on the ovarian response in patients with POR and advanced maternal age, the worst prognosis but more frequent group of poor responders attending fertility clinics. We will assess whether LH treatment prior to COS increases the number and quality of oocytes retrieved in those patients and, finally, analyse the impact in their chances of getting pregnant and having a baby.

Start: February 2019