Results 121 to 130 of about 133,217 (307)

Development of a nomogram for sperm retrieval at microTESE for idiopathic non‐obstructive azoospermia in a multi‐center cohort study

Andrology, EarlyView.
Abstract Background Non‐obstructive azoospermia (NOA) affects approximately 10% of infertile men and represents a major challenge in assisted reproductive technology (ART). A model that includes histological variants could be helpful in predicting sperm retrieval rate (SRR) after microdissection testicular sperm extraction (mTESE) in patients affected ...
Giorgio Ivan Russo, Edoardo Pozzi, Fausto Negri, Marco Falcone, Emanuele Zupo, Mirko Preto, Maria Giovanna Asmundo, Sandrine Chamayou, Murat Dursun, Ateş Kadıoğlu, Andrea Salonia   +10 more
wiley   +1 more source

Lactate inhibits glucose‐induced zigzag motility and enhances linear motility in bull spermatozoa by suppressing glycolysis

Andrology, EarlyView.
Abstract Background Energy metabolism and substrate balance are critical determinants of sperm motility and fertility. Linear motility is necessary for sperm forward movement, whereas hyperactivated motility is a prerequisite for fertilization. The preference of metabolic pathways depends on substrate availability which controls sperm motility. However,
Md Faizul Hossain Miraz, Takahiro Yamanaka, Shahrina Akter, Masanori Koyago, Masayuki Shimada   +4 more
wiley   +1 more source

Testicular sperm results in elevated miscarriage rates compared to epididymal sperm in azoospermic patients

São Paulo Medical Journal
CONTEXT: Several sperm retrievel techniques are available for use on azoospeermic men. Comparisons between spermatozoa retrieved from the testicles and epidymis in relation to pregnancy and miscarriage rates are not well established.
Edson Borges Júnior, Lia Mara Rossi-Ferragut, Fábio Firmbach Pasqualotto, Daniela Regina dos Santos, Cláudia Chagas Rocha, Assumpto Iaconelli Júnior   +5 more
doaj   +1 more source

Lycium barbarum polysaccharides enhance testicular spermatogenesis in d‐galactose‐induced aging rats via calcium signaling

Andrology, EarlyView.
Abstract Background Lycium barbarum polysaccharide (LBP) has long been recognized as having a wide range of beneficial properties for improving proliferation. However, the protective effects and specific mechanisms of d‐galactose‐induced testicular dysfunction in reproductively senescent rats are not fully understood.
Wenxin Ma, Chang Liu, Jing Pu, Ziyu Liu, Na Hu, Li Yang, Dongmei Chen, Hongmei Li, HuiMing Ma   +8 more
wiley   +1 more source

The Oxytocin Receptor in Spermatozoa May Originate From Both Spermatogenesis and Epididymal Maturation, and Regulates Capacitation

Andrology, EarlyView.
Abstract Background The oxytocin receptor (OR) is a G‐protein‐coupled receptor recently identified in human spermatozoa, whose origin and role in sperm physiology remain unknown. Objectives In this study, using the pig as a model, we examine the presence of the OR in ejaculated spermatozoa through immunofluorescence and immunoblotting, and investigate ...
Jesús Martínez‐Hernández, Ferran Garriga, Adeel Ahmad, Lorena Padilla, Carolina Maside, Sergi Bonet, Isabel Barranco, Jordi Roca, Luis Miguel Pastor, Marc Yeste   +9 more
wiley   +1 more source

Advanced Paternal Age Impacts Common Loci in the Sperm and Placenta DNA Methylomes

Andrology, EarlyView.
ABSTRACT Background Epidemiological studies have reported an association between advanced paternal age at conception and an increased risk of neurodevelopmental disorders in offspring, such as autism spectrum disorder. Evidence suggests that DNA methylation alterations in spermatozoa of older men may be transmitted to the feto‐placental unit and ...
Julia Barnwell, Sophia Rahimi, Sherri Lee Jones, Donovan Chan, Josée Martel, Sara Abdessamie, Catherine M. Herba, Jean R. Séguin, William D. Fraser, Celia M. T. Greenwood, Tuong‐Vi Nguyen, Tina C. Montreuil, Jacquetta Trasler   +12 more
wiley   +1 more source

Scanning Electron Microscopy of the Rainbow Trout (Salmo gairdneri Richardson) Spermatozoon [PDF]

, 1976
The scanning electron microscope was used to determine the morphology of the rainbow trout (Salmo gairdneri Richardson) spermatozoon. The spermatozoon is approximately 32 μm long and consists of a head, mitochondrial collar, and flagellum.
Fribourgh, James H., Soloff, Bernard L.
core   +2 more sources

CRISPR/Cas9‐mediated Genome‐editing Reveals 10 Testis‐enriched Genes and One Non‐testis‐enriched Gene are Dispensable for Male Fecundity in Mice

Andrology, EarlyView.
ABSTRACT Background More than 1000 genes have been identified as predominantly expressed in the human testis. Advances in gene editing technologies have enabled the rapid and efficient generation of genetically engineered mice. This approach facilitates the screening of genes essential for spermatogenesis by analyzing knockout mouse models.
Yumiao Qiu, Keisuke Shimada, Masahito Ikawa   +2 more
wiley   +1 more source

The Spermicide Effect from Methanol Extract of Kalangkala Seed (Litsea angulata) to Spermatozoa Mice (Mus musculus)

Journal of Agromedicine and Medical Sciences (AMS), 2016
Men involvement in family planning needs to be increased by providing natural spermicide from natural source which is safer. One of them is kalangkala seed which is endemic plant in South Kalimantan.
Rommy Akmal, Kuswanto Kuswanto, Syarifah Fahrunnisa, Ridha Aulia Rahmi, Nur Ema Putri Bayanil, Anni Nurliani   +5 more
doaj  

Healthy Aging Men Do Not Suffer From Relevant Limitations of Their Reproductive Functions

Andrology, EarlyView.
Abstract Background While metabolic disorders are well‐established contributors to testosterone decline and erectile dysfunction (ED), little is known about the natural progression of reproductive parameters in healthy aging men. Objectives This study aimed to evaluate longitudinal changes in reproductive parameters and sought to determine the ...
Simone Bier, Jann‐Frederik Cremers, Phillip Schrage, Amelie Körtje, Claudia Krallmann, Sabine Kliesch, Jörg Gromoll, Sandra Laurentino, Michael Zitzmann   +8 more
wiley   +1 more source