Results 31 to 40 of about 7,144,982 (296)

Sperm competition games: optimal sperm allocation in response to the size of competing ejaculates [PDF]

open access: yes, 2007
Engqvist L, Reinhold K. Sperm competition games: optimal sperm allocation in response to the size of competing ejaculates. Proceedings of the Royal Society B.
Reinhold, Klaus   +1 more
core   +1 more source

Semen quality analysis of military personnel from six geographical areas of the People’s Republic of China [PDF]

open access: yes, 2011
Objective: To examine the determinants of semen quality in a large sample of military personnel from different geographical areas of the People's Republic of China. Design: Cross-sectional study.
Haixiang Hu   +15 more
core   +1 more source

Falling sperm quality [PDF]

open access: yesBMJ, 1994
EDITOR,—Stephen Farrow comments on the quality of the evidence concerning a possible decline in sperm quality,1 focusing attention on our paper published in 1992.2 Farrow also responds to a paper by Peter Bromwich and colleagues, for which we provided the commentary.3 Farrow questions our systematic search of the databases MEDLINE and Index Medicus. A
Keiding, N.   +3 more
openaire   +4 more sources

In vitro evaluation of sperm quality

open access: yesAnimal Reproduction Science, 2008
This paper highlights selected laboratory analyses that are currently used to evaluate sperm, and describes why results from these assays do not consistently correlate with sperm fertility. Reasons for the disconnect between the two are due in part to the definition and reliability of the fertility data collected, to the complexity of the spermatozoon ...
Mocé, Eva, Graham, James K.
openaire   +3 more sources

The legacy of sperm banking: how fertility monitoring and disposal of sperm are linked with views of cancer treatment [PDF]

open access: yes, 2011
Background: sperm banking is recommended for all men before cancer treatment, which carries a risk of long-term gonadal damage. However, relatively few men take up the offer.
Arden-Close, Emily   +9 more
core   +1 more source

Computational Modelling of Sperm Behaviour in a 3D Virtual Oviduct [PDF]

open access: yes, 2011
The processes by which individual sperm cells navigate the length and complexity of the female reproductive tract and then reach and fertilise the oocyte are fascinating. Numerous complex processes potentially influence the movement of spermatozoa within
Burkitt, Mark
core   +4 more sources

Cryopreservation of Pike Perch Sperm in Hatchery Conditions [PDF]

open access: yes, 2008
Experiments were carried out on pike perch (Sander lucioperca L.) to find a method for stripping sperm without contamination by urine, to determine sperm concentration, and to fertilize large batches of eggs with cryopreserved sperm.
Urbányi, Béla   +3 more
core   +1 more source

Sperm mobility phenotype not determined by sperm quality index

open access: yesPoultry Science, 2003
We tested the capacity of the AviMate sperm quality analyzer to predict sperm mobility phenotype. A preliminary experiment was performed to determine a sperm concentration that afforded maximal sperm quality index (SQI) values with sperm from males with high sperm mobility.
D P, Froman, E R, Bowling, J L, Wilsont
openaire   +2 more sources

Genetic variance and genotype reaction norms in response to larval food manipulation for a trait important in scorpionfly sperm competition. [PDF]

open access: yes, 2008
Engqvist L. Genetic variance and genotype reaction norms in response to larval food manipulation for a trait important in scorpionfly sperm competition. Functional Ecology. 2008;22(1):070915213639001-???Sperm competition is an important attribute of many
L. Engqvist   +1 more
core   +1 more source

The Role of Dietary Nutrients in Male Infertility: A Review

open access: yesLife, 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

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