نتایج جستجو برای: oocyte freezing

تعداد نتایج: 32503  

2014
Julien Bessonnat Sophie Brouillet Sarah Sintzel Pierre Gillois Ulrike Bergues Caroline Boutte-Busquet Claire Thomas-Cadi Sylviane Hennebicq

BACKGROUND Intracytoplasmic Sperm Injection (ICSI) is an Assisted Reproduction Technique (ART) which offers the chance to conceive to patients presenting very low sperm counts (cryptozoospermia/severe oligozoospermia). Sperm freezing before the oocyte pick-up, can prevent from a lack of spermatozoa on the day of the ICSI. It can avoid the cancellation of the ICSI or the use of TESE (Testicular ...

Journal: :Animal reproduction science 2000
G P Byrne P Lonergan M Wade P Duffy A Donovan J P Hanrahan M P Boland

Ram spermatozoa are most susceptible to damage during freezing between the temperatures of -10 degrees C and -25 degrees C. The objectives of the present study were to examine how freezing rate through this critical temperature zone affected the fertility of spermatozoa as assessed in vivo and in vitro. Semen from six adult rams was frozen at two different rates ("fast": 5 degrees C/min from +5...

Journal: :Gynecology obstetrics & reproductive medicine 2022

OBJECTIVE: We aimed to determine the frequency of psychological distress and related factors in infertile women who underwent assisted reproductive technologies during COVID-19 pandemic develop health policies accordingly. STUDY DESIGN: This cross-sectional study was carried out with 352 applied vitro fertilization clinic between December 2020-February 2021. In face-to-face survey study, five q...

2008
N. Garg G. N. Purohit

The in vitro maturation, fertilization, and morphological changes of goat cumulus–oocyte complexes (COCs) cryopreserved by ultrarapid freezing using DPBS + 0.5% sucrose + 0.4% BSA and 4 M, 6 M, 8 M, or 10 M concentrations of glycerol (G) or ethylene glycol (EG) were studied. COCs were cryopreserved by ultrarapid freezing by holding them over LN2 vapor for 2-3 min and then plunging them into LN2...

Journal: :Reproduction in domestic animals = Zuchthygiene 2009
A M Luciano F Franciosi V Lodde F Perazzoli M Slezáková S Modina

Joining immature gamete cryopreservation and germinal vesicle transplantation (GVT) technique could greatly improve assisted reproductive technologies in animal breeding and human medicine. The present work was aimed to assess the most suitable cryopreservation protocol between slow freezing and vitrification for immature denuded bovine oocytes, able to preserve both nuclear and cytoplasmic com...

Elnaz Hekmat, Farideh Zafari Zangeneh, Maryam Bagheri, Mohammad Mehdi Naghizadeh, Samad Muhammadnejad,

Background: Connexon is a membrane structural protein in the gap junctions. These cellular connections are responsible for transporting ions and messenger molecules to the oocyte. This study aimed to investigate the role of beta-2-adrenoceptors in the process of follicle growth based on the expression of the two connexins 37/43 in the gap junctions that have a primary role in the mitotic resump...

Journal: :iranian red crescent medical journal 0
neda abedpour cellular and molecular research centre, qazvin university of medical sciences, qazvin, ir iran farzad rajaei cellular and molecular research centre, qazvin university of medical sciences, qazvin, ir iran; fertility and infertility research centre, kosar hospital, qazvin university of medical sciences, qazvin, ir iran; cellular and molecular research centre, qazvin university of medical sciences, qazvin, ir iran. tel: +98-2833336001, fax: +98-2833324970

conclusions the present study showed that vitrification using cryotop and freezing medium can damage oocytes by reducing the maturation and fertilization rates in both developmental stages. results vitrification caused a significant reduction in the maturation rate of oocytes. of those that matured, the fertilization rate of vitrified ivm-mii (44.1%) and ov-mii oocytes (50%) was not significant...

Journal: :آب و خاک 0
میان آبادی میان آبادی موسوی بایگی موسوی بایگی ثنایی نژاد ثنایی نژاد نظامی نظامی

abstract plants growth and development and physiological activities occur in a certain air temperature range. spit of this fact that zero temperature named as a freezing temperature, in agriculture meteorology, freezing happen in lower temperature which is different for plants that lead to their tissues damage. early autumn freezing cause damage to harvesting of cotton and sugar beet and affect...

2012
Alberto Revelli Emanuela Molinari Francesca Salvagno Luisa Delle Piane Elisabetta Dolfin Simona Ochetti

Thanks to the progress in oncostatic treatments, young women affected by cancer have a fairly good chance of surviving the disease and leading a normal post-cancer life. Quite often, however, polychemiotherapy and/or radiotherapy can induce ovarian damage and significantly reduce the content of follicles and oocytes inside the ovary, thus predisposing the patient to menstrual disorders, inferti...

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