Results 21 to 30 of about 492,766 (213)
Molecular Analysis of DPY19L2, PICK1 and SPATA16 in Italian Unrelated Globozoospermic Men
Life, 2021 This study aims to evaluate genetic contribution and sperm DNA fragmentation (SDF) in a cohort of 18 unrelated globozoospermic Italian men (Group G). Semen samples were assessed according to the WHO 2010 Laboratory Manual and compared with 31 fertile ...
Fabiana Faja +7 more
doaj +1 more source
Hydrodynamic propulsion of human sperm [PDF]
, 2009 The detailed fluid mechanics of sperm propulsion are fundamental to our understanding of reproduction. In this paper, we aim to model a human sperm swimming in a microscope slide chamber.
ALLAN A. PACEY +10 more
core +1 more source
Cooperation of Sperm in Two Dimensions: Synchronization, Attraction and Aggregation through Hydrodynamic Interactions [PDF]
, 2008 Sperm swimming at low Reynolds number have strong hydrodynamic interactions when their concentration is high in vivo or near substrates in vitro. The beating tails not only propel the sperm through a fluid, but also create flow fields through which sperm
D. M. Woolley +5 more
core +2 more sources
Reproductive Biology and Endocrinology, 2022 Background Previous research has shown that the type and duration of erotic material that men have access to during masturbation can influence semen parameters.
Daniel Rosenkjær +3 more
doaj +1 more source
Biomedicines, 2022 Virilization of gender-incongruent subjects to whom were assigned the female gender at birth (AFAB) is achieved through testosterone administration. Inter-individual differences in the timing and acquisition of phenotypic characteristics, even if the ...
Francesco Pallotti +12 more
doaj +1 more source
Sophisticated sperm allocation in male fowl [PDF]
, 2003 When a female is sexually promiscuous, the ejaculates of different males compete for the fertilization of her eggs; the more sperm a male inseminates into a female, the more likely he is to fertilize her eggs.
Pizzari, T. +4 more
core +1 more source
Human sperm RNA code senses dietary sugar. [PDF]
, 2020 A new study reveals that a high-sugar diet acutely alters human sperm small RNA profiles after 1 week and that these changes are associated with changes in sperm motility.
Chen, Qi, Zhang, Ying
core +1 more source
Factors affecting sperm recovery rates and survival after centrifugation of equine semen [PDF]
, 2012 Conventional centrifugation protocols result in important sperm losses during removal of the supernatant. In this study, the effect of centrifugation force (400 or 900 × g), duration (5 or 10 min), and column height (20 or 40 mL; Experiment 1); sperm ...
Eilts, B. E. +4 more
core +2 more sources
Protein-carbohydrate interactions during fertilization [PDF]
, 1998 Interaction between gametes during fertilization is at least in part regulated by carbohydrate moieties of the zona pellucida (ZP) and carbohydrate binding proteins of the sperm surface. This review focuses on the protein-carbohydrate interactions during
Kolle, S., Plendl, J., Sinowatz, Fred
core +1 more source
Gamete evolution and sperm numbers: sperm competition versus sperm limitation [PDF]
Proceedings of the Royal Society B: Biological Sciences, 2014 Both gamete competition and gamete limitation can generate anisogamy from ancestral isogamy, and both sperm competition (SC) and sperm limitation (SL) can increase sperm numbers. Here, we compare the marginal benefits due to these two components at any given population level of sperm production using the risk and intensity models in sperm economics. We
Geoff A, Parker, Jussi, Lehtonen
openaire +2 more sources