Results 11 to 20 of about 7,144,982 (296)

Sperm competition, sperm numbers and sperm quality in muroid rodents. [PDF]

open access: yesPLoS ONE, 2011
Sperm competition favors increases in relative testes mass and production efficiency, and changes in sperm phenotype that result in faster swimming speeds. However, little is known about its effects on traits that contribute to determine the quality of a
Laura Gómez Montoto   +7 more
doaj   +6 more sources

Sperm Quality Assessment in Honey Bee Drones

open access: yesBiology, 2020
The quality of honey bee drone semen is relevant in different contexts, ranging from colony productivity to pathology, toxicology and biodiversity preservation.
Jesús L. Yániz   +2 more
doaj   +3 more sources

Sperm competition selects for sperm quantity and quality in the Australian Maluridae.

open access: yesPLoS ONE, 2011
When ejaculates from rival males compete for fertilization, there is strong selection for sperm traits that enhance fertilization success. Sperm quantity is one such trait, and numerous studies have demonstrated a positive association between sperm ...
Melissah Rowe, Stephen Pruett-Jones
doaj   +5 more sources

Semen quality and sperm DNA fragmentation in cancer patients undergoing sperm cryopreservation [PDF]

open access: yesInvestigative and Clinical Urology, 2023
Purpose: We compared semen quality and sperm DNA fragmentation in cancer patients who underwent sperm banking and controls who underwent sperm cryopreservation for assisted reproductive technology (ART).
Seung-Hun Song   +7 more
doaj   +1 more source

Psychological and physiological adaptations to sperm competition in humans [PDF]

open access: yes, 2005
Postcopulatory competition between males, in the form of sperm competition, is a widespread phenomenon in many animal species. The extent to which sperm competition has been an important selective pressure during human evolution remains controversial ...
Pound, N, Goetz, AT, Shackelford, TK
core   +6 more sources

A Sperm Quality Detection System Based on Microfluidic Chip and Micro-Imaging System

open access: yesFrontiers in Veterinary Science, 2022
Sperm quality assessment is the main method to predict the reproductive ability of livestock. The detection of sperm quality of livestock is of great significance to the application of artificial insemination and in vitro fertilization.
Xiaoqing Pan   +11 more
doaj   +1 more source

Status of Sperm Functionality Assessment in Wildlife Species: From Fish to Primates

open access: yesAnimals, 2021
(1) Background: in order to propagate wildlife species (covering the whole spectrum from species suitable for aquaculture to endangered species), it is important to have a good understanding of the quality of their sperm, oocytes and embryos. While sperm
Gerhard van der Horst
doaj   +1 more source

Glutathione S-transferase Mu 3 is associated to in vivo fertility, but not sperm quality, in bovine

open access: yesAnimal, 2022
In the dairy breeding industry, pregnancy of dairy cows is essential to initiate milk production, so that high fertility rates are required to increase their productivity.
Ferran Garriga   +6 more
doaj   +1 more source

The impact of percutaneous epididymal sperm aspiration on sperm quality in mice

open access: yesReproduction and Fertility, 2023
In laboratory mice, sperm quality is usually assessed in spermatozoa collected from the cauda epididymidis of freshly sacrificed males. Percutaneous epididymal sperm aspiration (PESA) is a non-terminal alternative that would allow repeated sperm ...
Lisa Windhofer   +4 more
doaj   +1 more source

IMSI—Guidelines for Sperm Quality Assessment [PDF]

open access: yesDiagnostics, 2022
Intracytoplasmic sperm injection (ICSI) is a widely used and accepted treatment of choice for oocyte fertilization. However, the quality of sperm selection depends on the accurate visualization of the morphology, which can be achieved with a high image resolution.
Krzysztof Lukaszuk   +8 more
openaire   +3 more sources

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