Results 11 to 20 of about 256,819 (357)

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

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

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

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

The Function of Cumulus Cells in Oocyte Growth and Maturation and in Subsequent Ovulation and Fertilization

Cells, 2021
Cumulus cells (CCs) originating from undifferentiated granulosa cells (GCs) differentiate in mural granulosa cells (MGCs) and CCs during antrum formation in the follicle by the distribution of location. CCs are supporting cells of the oocyte that protect
Bongkoch Turathum, Er-Meng Gao, Ri-Cheng Chian   +2 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

Oocyte specific lncRNA variant Rose influences oocyte and embryo development

Non-coding RNA Research, 2021
Fully grown mammalian oocytes store a large amount of RNA synthesized during the transcriptionally active growth stage. A large part of the stored RNA belongs to the long non-coding class which contain either transcriptional noise or important ...
Rajan Iyyappan, Daria Aleshkina, Linkai Zhu, Zongliang Jiang, Veronika Kinterova, Andrej Susor   +5 more
doaj   +1 more source

Oocyte Competence Biomarkers Associated With Oocyte Maturation: A Review

Frontiers in Cell and Developmental Biology, 2021
Oocyte developmental competence is one of the determining factors that influence the outcomes of an IVF cycle regarding the ability of a female gamete to reach maturation, be fertilized, and uphold an embryonic development up until the blastocyst stage ...
Batara Sirait, Batara Sirait, Budi Wiweko, Budi Wiweko, Budi Wiweko, Ahmad Aulia Jusuf, Dein Iftitah, R. Muharam, R. Muharam, R. Muharam   +9 more
doaj   +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

Transcriptionally inactive oocyte-type 5S RNA genes of Xenopus laevis are complexed with TFIIIA in vitro [PDF]

, 1987
An extract from whole oocytes of Xenopus laevis was shown to transcribe somatic-type 5S RNA genes approximately 100-fold more efficiently than oocyte-type 5S RNA genes.
Eversole-Cire, Pamela, Gottesfeld, Joel M., Millstein, Larry, Peck, Lawrence J., Varshavsky, Alexander   +4 more
core   +1 more source