نتایج جستجو برای: oocyte number

تعداد نتایج: 1181092  

Journal: :Human reproduction 2002
Jan Tesarik Carmen Mendoza

BACKGROUND The role of exogenous LH supplementation in ovarian stimulation is a matter of debate. Here we evaluate the impact of exogenous LH on oocyte yield and developmental competence in an oocyte donation programme. METHODS Oocyte donors were randomized (computer-generated randomization list) to groups stimulated with FSH alone or with a combination of FSH and LH after pituitary down-regu...

Journal: :Human reproduction 2001
K D Nusser S Mitalipov A Widmann B Gerami-Naini R R Yeoman D P Wolf

Oocyte quantity and quality are critical to assisted reproductive technology (ART), yet few assessments beyond counting metaphase II (MII) oocytes exist. In this study, 30 +/- 2 oocytes per cycle were recovered from rhesus monkeys subjected to follicular stimulation with human gonadotrophins, of which 15 +/- 1 were MII. Oocyte quality was investigated by monitoring the developmental potential o...

2016
Gian Mario Tiboni Enrica Concetta Colangelo Adalisa Ponzano

Decreasing the dose of human chorionic gonadotropin (hCG) used to trigger final oocyte maturation in assisted reproductive technology programs is regarded as a useful intervention in the prevention of ovarian hyperstimulation syndrome, but the minimal effective dose has not been yet identified. In this study, the capacity of a reduced dose of recombinant hCG (r-hCG) to provide adequate oocyte m...

The aim of all assisted reproductive techniques (ART) is a live birth of a single healthy baby. Many clinical and laboratory strategies can influence the ART clinical outcomes. In this lecture we try to explore the clinical and laboratory strategies to maximize success in ART. Three are the main issues: 1. optimize the number of oocyte retrieved with an individualized controlled ovarian superov...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده کشاورزی 1390

abstract previous researches have shown success of growth hormones usage on flower production increase, pod and prevention of abscission of them in some of the pulses. two tests were done, in order to find out the effects of growth hormones to on flower production increase, pod and chick pea yield composites in farmer conditions (2010-11) and green house conditions as factorial on the proje...

Journal: :Human reproduction update 2015
Giovanni Coticchio Mariabeatrice Dal Canto Mario Mignini Renzini Maria Cristina Guglielmo Fausta Brambillasca Diana Turchi Paola Vittoria Novara Rubens Fadini

BACKGROUND In a growth phase occurring during most of folliculogenesis, the oocyte produces and accumulates molecules and organelles that are fundamental for the development of the preimplantation embryo. At ovulation, growth is followed by a phase of maturation that, although confined within a short temporal window, encompasses modifications of the oocyte chromosome complement and rearrangemen...

Journal: :international journal of reproductive biomedicine 0
mohammad ali khalili stefania a nottola abbas shahedi guido macchiarelli

the use of ovarian stimulation for infertility treatment is associated with side effects of ovarian hyperstimulation syndrome (ohss) and potential cancer risk. this is also true in high risk women such as those polycystic with ovary (pco) and polycystic ovarian syndrome (pcos). in vitro maturation (ivm) of oocytes was primarily developed to make ivf safe for women with pco and at high risk of o...

Journal: :international journal of reproductive biomedicine 0
bing he cheng junping huang li tan weihong xue lintao wang shikai

background: human menopausal gonadotropin (hmg) has contributed many improvements to human assisted reproduction. however, effects of hmg on oocyte development and clinical results remain controversial. objective: this study was conducted to investigate the effects of hmg on the zona pellucida of oocytes, as well as clinical results in superovulation treatment. materials and methods: this retro...

Journal: :Human reproduction 2001
J Neulen D Wenzel C Hornig E Wünsch U Weissenborn K Grunwald R Büttner H Weich

This study was designed to detect vascular endothelial growth factor (VEGF) and its soluble receptor (sVEGFR-1) in follicular fluid specimens and to evaluate the importance of sVEGFR-1 with respect to ovarian response to gonadotrophin stimulation. A total of 69 patients was treated for IVF with recombinant human follicle stimulating hormone (FSH). Concentrations of VEGF and sVEGFR-1 were quanti...

Journal: :The international journal of biochemistry & cell biology 2012
Gaëlle Marteil Jean-Philippe Gagné Ewa Borsuk Laurent Richard-Parpaillon Guy G Poirier Jacek Z Kubiak

Cyclin-dependent kinase 1 (CDK1) is a major M-phase kinase which requires the binding to a regulatory protein, Cyclin B, to be active. CDK1/Cyclin B complex is called M-phase promoting factor (MPF) for its key role in controlling both meiotic and mitotic M-phase of the cell cycle. CDK1 inactivation is necessary for oocyte activation and initiation of embryo development. This complex process req...

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