Results 21 to 30 of about 81,743 (268)
Decline of semen quality among Chinese sperm bank donors within 7 years (2008-2014)
Asian Journal of Andrology, 2017 Semen from 5210 sperm bank donors was analyzed and trends in semen quality were evaluated at Shandong Human Sperm Bank between 2008 and 2014. After 2-7 days of abstinence, semen samples were collected.
Li Wang +5 more
doaj +1 more source
Restoring Sperm Quality Post-Cryopreservation Using Mitochondrial-Targeted Compounds
Antioxidants, 2022 While critical for male fertility preservation, cryopreservation damage reduces sperm quality and fertilization potential. This study investigated whether the addition of mitochondrial-targeted, antioxidant compounds, also known as Mitochondrial ...
Macarena Gonzalez +5 more
doaj +1 more source
Cryopreservation and quality assessment of boar semen collected from bulk samples
Veterinární Medicína, 2019 The purpose of this study was to examine sperm quality after cryopreservation of ejaculates collected as a bulk sample, which is routinely part of semen collection, and to compare this quality with the sperm-rich fraction in boars.
Ruthaiporn Ratchamak +3 more
doaj +1 more source
The Role of Dietary Nutrients in Male Infertility: A Review
Life, 2023 Male infertility is the main health issue with economic, psychological, and medical attributions. Moreover, it is characterized by an inability to produce a sufficient amount of sperm for the fertilization of an oocyte.
Mona S. Almujaydil
doaj +1 more source
Factors affecting sperm quality before and after mating of calopterygid damselflies. [PDF]
PLoS ONE, 2010 Damselflies (Odonata: Zygoptera) have a more complex sperm transfer system than other internally ejaculating insects. Males translocate sperm from the internal reproductive organs to the specific sperm vesicles, a small cavity on the body surface, and ...
Kaori Tsuchiya, Fumio Hayashi
doaj +1 more source
Effects of temperature anomaly on sperm quality: A multi-center study of 33,234 men
HeliyonBackgrounds: Global fertility rates continue to decline and sperm quality is a prime factor affecting male fertility. Both extreme cold and heat have been demonstrated to be associated with decreased sperm quality, but no epidemiological studies have ...
Lina Xiao +15 more
doaj +1 more source
Effects of L-carnitine and L-acetyl-carnitine on testicular sperm motility and chromatin quality [PDF]
Iranian Journal of Reproductive Medicine, 2012 Background: Sperm cells extracted from testes (TESE) have poor chromatin quality and motility. Various substances are used in the laboratory to increase sperm motility and improve the ART outcomes; however, there are few research which considered ...
Elham Aliabadi +5 more
doaj
Frontiers in Ecology and Evolution, 2017 Sperm viability (SV), the proportion of live sperm in a sample, is a widely applied measure of sperm quality but few studies test its robustness. At least three reasons make SV problematic as a surrogate for sperm quality. First, reviewing the ecological
Barbara A. Eckel +2 more
doaj +1 more source
Study on Influencing Factors of Semen Quality in Fertile Men
Frontiers in Physiology, 2022 ObjectiveTo establish a system for evaluation of semen quality in fertile men by factor analysis (FA).MethodsThe FA method was used to analyze five sperm test indicators for fertile men (sperm pH, sperm motility, sperm progressive motility, semen density,
Ning Wang +9 more
doaj +1 more source
FEBS Open Bio, EarlyView.This study optimizes a two‐step induction system to generate PGCLCs from chicken ESCs. The induced cells express germline markers and migrate to gonads in ovo, offering a novel approach for avian genetic resource conservation. Primordial germ cells (PGCs) are the progenitor cells of sperm and eggs.
Zeyu Li +10 more
wiley +1 more source