Results 1 to 10 of about 487,985 (362)
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.
Johnson, D D P, Briskie, J V
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Post-Thaw Sperm Recovery Rates; A Retrospective Study
Fertility & Reproduction, 2022 Background: Cryopreservation is currently the only fertility preservation option available to patients undergoing gonadotoxic treatment. Much research in the field focusses on techniques, media and equipment employed to cryopreserve cells, and ...
Pui Ying LEUNG +4 more
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Validation of sORP, a Measure of Oxidative Stress, in Australian Population
Fertility & Reproduction, 2022 Background: Excessive reactive oxygen species are normally eliminated by seminal plasma free radical antioxidant scavengers and enzymes. Assessing the oxidation reduction potential of seminal fluid (mV/million sperm/mL) enables the detection of an ...
Yu-Cih SHIH +4 more
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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
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External quality assessment scheme for sperm DNA fragmentation: a pilot study in China
Basic and Clinical Andrology, 2023 Background The aim of this article is to establish an external quality assessment (EQA) scheme for sperm Deoxyribonucleic acid (DNA) fragmentation (SDF) detection, and to assess the feasibility of the scheme.
Yan Zheng +9 more
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Bladder Neck Obstruction: Experience and Management in a Sperm Bank
Life, 2023 Primary Bladder Neck Obstruction (PBNO) management provides medical and surgical treatment, such as transurethral incisions that can lead to retrograde ejaculation.
Maria Neve Hirsch +9 more
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Reproductive Biology and Endocrinology, 2022 Follicle-stimulating hormone signaling is essential for the initiation and early stages of spermatogenesis. Follicle-stimulating hormone receptor is exclusively expressed in Sertoli cells.
Jia-Ming Wang +3 more
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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
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Cells, 2022 Preservation of human spermatozoa in vitro at normothermia or hypothermia maintaining their functions and fertility for several days plays a significant role in reproductive biology and medicine.
Qingyuan Cheng +8 more
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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
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