Results 11 to 20 of about 132,905 (308)

The Presence of Immature GV− Stage Oocytes during IVF/ICSI Is a Marker of Poor Oocyte Quality: A Pilot Study

Medical Sciences, 2020
Here we investigate whether the presence of germinal vesicle-stage oocytes (GV− oocytes) reflects poor oocyte developmental competence (or quality).
Pia Astbury, Goutham N. Subramanian, Jessica Greaney, Chris Roling, Jacqui Irving, Hayden A. Homer   +5 more
doaj   +1 more source

Oocyte cryopreservation [PDF]

Human Reproduction, 1998
Cryopreservation of human oocytes has been employed with little success in clinical practice, even though it may solve the legal and ethical problems linked to embryo freezing. Various attempts to cryopreserve human oocytes have mostly been unsuccessful, leading to low oocyte survival rates after thawing, and the search for an optimal protocol for ...
R, Fabbri, E, Porcu, T, Marsella, M R, Primavera, R, Seracchioli, P M, Ciotti, O, Magrini, S, Venturoli, C, Flamigni   +8 more
openaire   +2 more sources

An Eight Year Experience of Autologous Oocyte Vitrification for Infertile Patients Owing to Unavailability of Sperm on Oocyte Retrieval Day

Frontiers in Medicine, 2021
Objective: The objective of this study was to provide a descriptive analysis of the clinical outcomes achieved in oocyte vitrification in cases where sperm was unavailable on oocyte retrieval day, and to identify predictors of oocyte survival.Methods ...
Xiao Fu, Xiao Fu, Xiao Fu, Xiaojie Liu, Xiaojie Liu, Xiaojie Liu, Jing Li, Jing Li, Jing Li, Meng Zhang, Meng Zhang, Meng Zhang, Jingjing Jiang, Jingjing Jiang, Qianqian Chen, Qianqian Chen, Mei Li, Mei Li, Shanshan Gao, Shanshan Gao, Shanshan Gao, Jinlong Ma, Jinlong Ma   +22 more
doaj   +1 more source

Oocyte maturation [PDF]

Human Reproduction, 1998
Primary oocytes recovered from small and growing follicles of > or = 3 mm in the ovaries of untreated women, can be matured in vitro, will fertilize and develop in vitro, and when transferred to the patient, develop to term. However, the implantation rate of cleaved embryos has been disappointingly low and when embryos are allowed to develop beyond the
A, Trounson, C, Anderiesz, G M, Jones, A, Kausche, N, Lolatgis, C, Wood   +5 more
openaire   +2 more sources

Is there an optimal timing interval between hCG trigger and oocyte vitrification?

Taiwanese Journal of Obstetrics & Gynecology, 2022
Objective: Oocyte vitrification has been developed as a promising alternative to slow freezing; however, the clinical outcome is highly operator dependent.
Yu-Wen Weng, Ming-Huei Lin, Robert Kuo-Kuang Lee, Sheng-Hsiang Li, Quan-Bin Jou, Ying Ju Chen   +5 more
doaj   +1 more source

Nampt-mediated spindle sizing secures a post-anaphase increase in spindle speed required for extreme asymmetry

Nature Communications, 2020
Meiotic cell division in oocytes is asymmetric and requires microtubule spindle migration after anaphase-onset. Here, the authors show that Nampt, an enzyme of the Nicotinamide adenine dinucleotide (NAD) biosynthetic pathway, contributes to post-anaphase
Zhe Wei, Jessica Greaney, Wei-Guo Nicholas Loh, Hayden Anthony Homer   +3 more
doaj   +1 more source

Is It Possible to Expand Oocyte Donors by Decreasing Number of Oocytes for Own Use? Insights From a Large Single-Center Study

Frontiers in Endocrinology, 2021
BackgroundCurrently, in China, only women undergoing in vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI) cycles can donate oocytes to others, but at least 15 oocytes must be kept for their own treatment.
Zhiqin Bu, Jiaxin Zhang, Yile Zhang, Yingpu Sun   +3 more
doaj   +1 more source

A PAR-1-dependent orientation gradient of dynamic microtubules directs posterior cargo transport in the Drosophila oocyte [PDF]

, 2011
Cytoskeletal organization is central to establishing cell polarity in various cellular contexts, including during messenger ribonucleic acid sorting in Drosophila melanogaster oocytes by microtubule (MT)-dependent molecular motors.
Lu, Weiping, Hamilton, RS, Hamilton, R, C. Fiona Cullen, Weiping Lu, Parton, Richard M., Cullen, CF, Parton, R, Ball, G, Ohkura, Hiroyuki, Yang, L, Lei Yang, Ilan Davis, Davis, Ilan, Parton, RM, Russell S. Hamilton, Hamilton, Russell S., Ohkura, H, Cullen, C. Fiona, Richard M. Parton, Graeme Ball, Yang, Lei, Hiroyuki Ohkura, Davis, I, Cullen, Fiona, Ball, Graeme, Lu, W   +26 more
core   +1 more source

Oocyte maturity, oocyte fertilization and cleavage-stage embryo morphology are better in natural compared with high-dose gonadotrophin stimulated IVF cycles. [PDF]

, 2023
RESEARCH QUESTION Does high-dose gonadotrophin stimulation have an effect on oocyte and early-stage embryo development? DESIGN This was a retrospective study including 616 natural cycle IVF (NC-IVF) and 167 conventional IVF (cIVF) cycles.
Eisenhut, Markus, Stute, Petra, von Wolff, Michael, Helmer, Anja, Magaton, Isotta M, Roumet, Marie   +5 more
core   +1 more source

Review: Environment of the ovulatory follicle: modifications and use of biotechnologies to enhance oocyte competence and increase fertility in cattle

Animal, 2023
The oocyte is the basis of life, supporting development from a fertilized cell to an independent multicellular organism. The oocyte’s competence to drive the first cell cycles postfertilization are critical to embryonic survival and subsequent successful
Camila Bortoliero Costa, Trudee Fair, Marcelo M. Seneda   +2 more
doaj   +1 more source