Results 41 to 50 of about 2,944,740 (334)
Sexual selection and the evolution of sperm morphology in sharks
Journal of Evolutionary Biology, 2019 Post‐copulatory sexual selection, and sperm competition in particular, is a powerful selective force shaping the evolution of sperm morphology. Although mounting evidence suggests that post‐copulatory sexual selection influences the evolution of sperm ...
Amy G Rowley +16 more
semanticscholar +1 more source
Sperm morphology and evidence for sperm competition among parrots [PDF]
Journal of Evolutionary Biology, 2019 AbstractSperm competition is an important component of post‐copulatory sexual selection that has shaped the evolution of sperm morphology. Previous studies have reported that sperm competition has a concurrently directional and stabilizing effect on sperm size.
Luisana Carballo +6 more
openaire +3 more sources
Effect of Phaleria macrocarpa on Sperm Characteristics in Adult Rats [PDF]
Advanced Pharmaceutical Bulletin, 2013 Purpose: The purpose of this study was to determine the effects of Phaleria macrocarpa (PM) on male fertility by assessing its effect on the sperm characteristics which included the sperm count, motility, viability and morphology.
Saadat Parhizkar +2 more
doaj +1 more source
Prevalence of Abnormal Semen Parameters among Male Patients Attending the Fertility Center in Khartoum, Sudan [PDF]
Journal of Medical and Life Science, 2022 Background: More than 70 million couples worldwide are affected by infertility. With a male factor infertility account for about half of the cases. Semen analysis is critical for determining male fertility potential. Objective: To estimate the prevalence
Alaa Ali +3 more
doaj +1 more source
Quest for An Ideal, Simple and Cost-Effective Stain for Morphological Assessment of Sperms [PDF]
Journal of Clinical and Diagnostic Research, 2015 Background: Recent alarming trends of a substantial rise in the number of cases of infertility with as many as 30-40% being attributed to male-factor associated causes have created a need for further studies and advancements in semen analysis ...
Hemalatha Anthanahalli Lingappa +7 more
doaj +1 more source
Mitochondrial behaviour throughout the lytic cycle of Toxoplasma gondii [PDF]
, 2017 Mitochondria distribution in cells controls cellular physiology in health and disease. Here we describe the mitochondrial morphology and positioning found in the different stages of the lytic cycle of the eukaryotic single-cell parasite Toxoplasma gondii.
Lemgruber, Leandro +4 more
core +2 more sources
Logistic Regression Analysis Factors Affecting Sperm Motility and Abnormal Sperm Morphology in Boars
Animals, 2019 Logistic regression models, including variables of boar breed, age, serum, and seminal plasma elements, were used to identify the influencing factors of sperm motility and morphology in this study.
Yinghui Wu +5 more
doaj +1 more source
Sperm morphology and DNA fragmentation after zona pellucida selection
Reproduction and Fertility, 2021 Sperm DNA fragmentation (SDF) and sperm morphological defects can negatively affect ART outcomes. Consequently, there is a need for additional semen processing technique that accounts for sperm DNA status and morphology prior to ICSI.
Rumiana Ganeva +5 more
doaj +1 more source
Cryoprotectant-free vitrification of human spermatozoa in new artificial seminal fluid [PDF]
, 2016 Vitrification is a new method that has been recently introduced in Assisted Reproduction Technique programs. The aim of this study was to design a new medium similar to normal human seminal fluid (SF), formulation artificial seminal fluid (ASF), and to ...
Agha Rahimi, A. +4 more
core +1 more source
Archives of medical science : AMS, 2018 Introduction Diabetes mellitus (DM) has been associated with sperm damage. In view of the fact that quercetin possesses antioxidant and anti-inflammatory activities, this compound may help to protect sperm against damage in DM.
S. Yelumalai +4 more
semanticscholar +1 more source