Results 11 to 20 of about 740,952 (392)
Sperm competition and sperm length in shorebirds [PDF]
The Condor, 1999 We investigated how sperm morphology varies across 16 species of shorebirds in the Scolopa- cidae, Charadriidae, and Jacanidae. Sperm were sig- nificantly longer in nonmonogamous than in socially monogamous species.
Briskie, J V, Johnson, D D P
core +4 more sources
Sperm design and sperm function [PDF]
Biology Letters, 2006 Spermatozoa vary enormously in their form and dimensions, both between and within species, yet how this variation translates into fertilizing efficiency is not known. Sperm swimming velocity is a key determinant of male fertilization success, but previous efforts to identity which sperm phenotypic traits are associated with swimming ...
Malo Valenzuela, Aurelio F. +5 more
openaire +4 more sources
Sperm Viability and Sperm Competition in Insects [PDF]
Current Biology, 2002 Sperm quality plays an important role in vertebrates in determining which male has the advantage when two or more males compete to fertilize a female's ova. In insects, however, the importance of sperm quality has never been considered, despite sperm competition being widespread and well studied in this group.
Tim R. Birkhead, F.M Hunter
openaire +3 more sources
Sperm Cholesterol Content Modifies Sperm Function and TRPV1-Mediated Sperm Migration [PDF]
International Journal of Molecular Sciences, 2021 Transient receptor potential channels-vanilloid receptor 1 (TRPV1) regulates thermotaxis in sperm-oriented motility. We investigated the role of membrane cholesterol (Chol) on TRPV1-mediated human sperm migration. Semen samples were obtained from five normozoospemic healthy volunteers.
De Toni L. +9 more
openaire +3 more sources
Life, 2022 We wish to congratulate Boitrelle and colleagues for their comprehensive critical review on the Sixth Edition of the WHO Laboratory Manual for Human semen examination [...]
Francesco Pallotti +2 more
doaj +1 more source
Sperm DNA fragmentation testing: Summary evidence and clinical practice recommendations
Andrologia, 2020 We herein summarise the evidence concerning the impact of sperm DNA fragmentation in various clinical infertility scenarios and the advances on sperm DNA fragmentation tests. The collected evidence was used to formulate 41 recommendations.
S. Esteves +7 more
semanticscholar +1 more source
Sperm-Hybrid Micromotor for Targeted Drug Delivery. [PDF]
ACS Nano, 2017 A sperm-driven micromotor is presented as a targeted drug delivery system, which is appealing to potentially treat diseases in the female reproductive tract.
Haifeng Xu +5 more
semanticscholar +1 more source
Cryopreservation of single-sperm: where are we today?
Reproductive Biology and Endocrinology, 2020 Background Patients with severe oligospermia and nonobstructive azoospermia have very limited numbers of viable sperm in their epididymal and testicular samples. Thus, cryopreservation of their sperm is performed to avoid repeated sperm retrievals and to
Shasha Liu, Fuping Li
doaj +1 more source
The evolution of sperm morphometry in pheasants [PDF]
, 2007 Postcopulatory sexual selection is thought to be a potent evolutionary force driving the diversification of sperm shape and function across species. In birds, insemination and fertilisation are separated in time and sperm storage increases the duration
Birkhead, T.R. +5 more
core +3 more sources
Current Biology, 2012 (Uploaded by Plazi for the Bat Literature Project) No abstract provided.
Teri J. Orr, Marlene Zuk
openaire +3 more sources