نتایج جستجو برای: oocytes diameter

تعداد نتایج: 133321  

Journal: :avicenna journal of medical biotechnology 0

background: the following study was carried out to determine the ultrastructural features of the oocyte of the ovulatory-sized follicles in relation to concentrations of steroids and igf-i in the follicular fluid and serum in the dromedary camel. methods: camel follicles with a clear and healthy appearance were categorized into three classes: follicles 10 to 13.9, 14-17.9 and 18-30 mm diameter....

Journal: :Reproduction 2015
Shuo Xiao Francesca E Duncan Lu Bai Catherine T Nguyen Lonnie D Shea Teresa K Woodruff

Encapsulated in vitro follicle growth (eIVFG) has great potential to provide an additional fertility preservation option for young women and girls with cancer or other reproductive health threatening diseases. Currently, follicles are cultured for a defined period of time and analyzed as a cohort. However, follicle growth is not synchronous, and culturing follicles for insufficient or excessive...

Journal: :Human reproduction 2000
S Kahraman K Yakin E Dönmez H Samli M Bahçe G Cengiz S Sertyel M Samli N Imirzalioğlu

Couples undergoing intracytoplasmic sperm injection (ICSI) for male infertility using oocytes with centrally located granular cytoplasm (CLCG) were evaluated for fertilization, embryo development, implantation and pregnancy rate. CLCG is a rare morphological feature of the oocyte, that is diagnosed as a larger, dark, spongy granular area in the cytoplasm. Severity is based on both the diameter ...

Journal: :Iranian journal of reproductive medicine 2015
Hamed Karami Shabankareh Mohammad Hamed Shahsavari Hadi Hajarian Gholamali Moghaddam

BACKGROUND Previous studies reported many discrepancies about the effects of corpus luteum (CL) and ovarian follicle size on the developmental competence of oocytes. OBJECTIVE The aim of this study was to investigate the effects of CL and different size of follicle on the developmental potential of bovine oocytes. MATERIALS AND METHODS After ovarian classification based on presence or absen...

Journal: :Human reproduction 1997
M E Dell'Aquila Y S Cho P Minoia V Traina G M Lacalandra F Maritato

The aim of this study was to compare the effect of the addition of follicular fluid (FF) collected from preovulatory follicles with that of oestrous mare serum (EMS) (acting as the control) to TCM-199 medium on the in-vitro maturation, fertilization and development of equine cumulus-enclosed oocytes. Oocytes (<30 mm in diameter) were obtained from the ovaries of slaughtered mares. After in-vitr...

Journal: :Reproduction, fertility, and development 1995
A Boediono S Saha C Sumantri T Suzuki

Mature bovine oocytes were activated with 7% ethanol followed by cytochalasin B or D treatment. Most oocytes extruded a second polar body and formed one pronucleus when treated with 7% ethanol alone [35/43 (81%)]. With ethanol followed by cytochalasin B or D, overall activation frequency was 70% (309/441), with activated oocytes containing two pronuclei. The cleavage rate was not significantly ...

2017
Simone Ferrero Carolina Scala Emanuela Tafi Annalisa Racca Pier Luigi Venturini Umberto Leone Roberti Umberto Leone Roberti Maggiore

Objective: To assess the response to superovulation for in vitro fertilization (IVF) in patients with unilateral endometriomas with diameter ≥ 5 cm and in the contralateral healthy ovary. Study design: This retrospective analysis of a prospectively collected database included patients who underwent superovulation for IVF/ICSI cycles and had unoperated single unilateral endometrioma with diamete...

A. Javed M. J Ghani S. M. Kalantar S. Rezaei-Zarchi, S. Soufian

Developing a culture system for preantral follicles has important biotechnological implications due to the potential to produce a large number of oocytes for embryo production and transfer. To accomplish this goal, the present study was aimed to culture preantral follicles in the presence of different media, sera and FSH concentrations. Six-week-old preantral follicles (95 ± 5 µm) were cultured...

Journal: :Development 2011
Janet E Holt Suzanne M-T Tran Jessica L Stewart Kyra Minahan Irene García-Higuera Sergio Moreno Keith T Jones

FZR1, an activator of the anaphase-promoting complex/cyclosome (APC/C), is recognized for its roles in the mitotic cell cycle. To examine its meiotic function in females we generated an oocyte-specific knockout of the Fzr1 gene (Fzr1(Δ/Δ)). The total number of fully grown oocytes enclosed in cumulus complexes was 35-40% lower in oocytes from Fzr1(Δ/Δ) mice and there was a commensurate rise in d...

Journal: :Biocell : official journal of the Sociedades Latinoamericanas de Microscopia Electronica ... et. al 2006
Leonor M E Ituarte Teresa B Viera Teobaldo A Saldeña Juan C de Rosas Mabel Fóscolo Jorge E Ibáñez Fernando D Saraví

Electrophysiological events occur early after fertilization, along with changes in intracellular Ca2+ concentration. Passive electrical parameters were determined in golden hamster oocytes by whole cell patch-clamp method. In separate experiments the effect of 4-aminopyridine on resting oocytes was tested. The single-channel patch clamp configuration was employed to assess the electrical respon...

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