Results 101 to 110 of about 20,947 (214)

Loss‐of‐Function Variants in CCDC189 Cause Human Oligoasthenoteratozoospermia by Disrupting Sperm Flagellar and Acrosomal Architecture

Andrology, EarlyView.
ABSTRACT Background Oligoasthenoteratozoospermia (OAT), characterized by reduced sperm count, impaired motility, and abnormal morphology, is a major cause of male infertility with substantial genetic heterogeneity. However, the underlying genetic etiology remains unresolved in a large proportion of affected individuals.
Jianteng Zhou, Ghulam Mustafa, Tingting Lin, Jingwei Ye, Huan Zhang, Hanwei Jiang, Kexin Yang, Guoning Huang, Qinghua Shi   +8 more
wiley   +1 more source

Improving ARTs: Microfluidics as a Tool for Sperm Selection

Andrology, EarlyView.
ABSTRACT Sperm selection is a critical step in assisted reproductive technology (ART), as sperm quality directly influences embryo quality. In vivo, the female reproductive tract imposes several physical and physiological barriers that favors only the most optimal spermatozoa reaching the fertilization site.
A. Pérez‐Gómez, A. Urriés, J. L. de Pablo, L. Serrano‐Ramón, S. Sanchez, R. Herrer, J. M. Morrell, C. Malo   +7 more
wiley   +1 more source

Blastocyst age, expansion, trophectoderm morphology, and number cryopreserved are variables predicting clinical implantation in single blastocyst frozen embryo transfers in freeze-only-IVF

, 2021
To determine which blastocyst assessment variables predict clinical implantations in single blastocyst frozen embryo transfers (FET) of freeze-only-IVF cycles, following improved vitrified-warmed blastocyst survival and developmental competence ...
Coetzee, Kevin
core   +1 more source

Male Mice Heterozygous for Protamine 1 and Protamine 2 Are Infertile, Displaying Sperm Damage and Retention of Protamine 2 Precursors, Transition Proteins, and Histones

Andrology, EarlyView.
ABSTRACT Background During spermiogenesis, protamines (PRMs) replace histones to hypercondense and protect sperm DNA. Rodents and primates express two PRMs (PRM1 and PRM2). Alterations of species‐specific PRM ratios are associated with sub‐ or infertility in mice and humans.
Gina Esther Merges, Christoph Wiesejahn, Mar Domingo‐Lopez, Simon Schneider, Andjela Kovacevic, Lena Arévalo, Hubert Schorle   +6 more
wiley   +1 more source

Cytokines and Blastocyst Hatching

, 2016
Blastocyst implantation into the uterine endometrium establishes early pregnancy. This event is regulated by blastocyst- and/or endometrium-derived molecular factors which include hormones, growth factors, cell adhesion molecules, cytokines and proteases.
Vani, Venkatappa, Madhulika, Pathak, Seshagiri, Polani B   +2 more
core  

Diverse Roles of Prostaglandins in Blastocyst Implantation [PDF]

, 2014
Prostaglandins (PGs), derivatives of arachidonic acid, play an indispensable role in embryo implantation. PGs have been reported to participate in the increase in vascular permeability, stromal decidualization, blastocyst growth and development ...
Naguib Salleh
core   +1 more source

A CCNA1 Missense Variant Associated With Chromatid Non‐Disjunction in Abnormal‐Headed Sperm and Male Infertility

Andrology, EarlyView.
ABSTRACT Background Macrozoospermia is a rare form of teratozoospermia characterized by tetraploids, large‐headed spermatozoa with multiple flagella, usually caused by bi‐allelic AURKC mutations. The etiology of atypical phenotypes with a lower proportion of large headed spermatozoa and single flagella however often remains unresolved.
Aurore Perrin, Frédéric Morel, Zeina Wehbe, Cynthia Frapsauce, Nadia Gueganic, Corinne Tous, Séverine Commet, Laura Dijols, Audrey Basinko, Nathalie Douet‐Guilbert, Célia Tebbakh, Zine‐Eddine Kherraf, Pierre F. Ray, Charles Coutton, Guillaume Martinez   +14 more
wiley   +1 more source

Differential Sperm DNA Methylation Profiles in Healthy Men With High Versus Low Adherence to the Mediterranean Diet in the Led‐Fertyl Study

Andrology, EarlyView.
ABSTRACT Background Diet is known to play an essential role not only in sperm quality but also in offspring health, likely mediated through the sperm epigenome. Moreover, one of the main components of the Mediterranean diet (MedDiet) (i.e., nuts) have shown to impact sperm DNA methylation patterns.
Rashmi Agarwal, Nancy Babio, Estefanía Davila‐Cordova, María Fernández de la Puente, Cristina Valle‐Hita, Carles Arribas, Manel Esteller, Aleix Noguera‐Castells, Raquel Pluvinet, Jordi Salas‐Salvadó, Albert Salas‐Huetos   +10 more
wiley   +1 more source

Aneuploidy in the Human Blastocyst

Cytogenetic and Genome Research, 2011
Studies of human cleavage stage embryos, 3 days after fertilization of the oocyte, have revealed remarkably high levels of chromosome abnormality. In addition to meiotic errors derived from the gametes, principally the oocyte, mitotic errors occurring after fertilization are also common, leading to widespread chromosomal mosaicism.
Fragouli, E, Wells, D
openaire   +2 more sources

A Defense of Post‐Viability Abortion

Bioethics, EarlyView.
ABSTRACT It is often thought that Thomson's Violinist argument is only applicable before the point of viability. In this paper, I propose that this is not the case, offering a novel defense of post‐viability abortion utilising Thomson's self‐defense framework. I first set out Thomson's Violinist argument and how it interacts with viability.
Jina Kim
wiley   +1 more source