Results 31 to 40 of about 65,346 (303)

The efficiency of conventional microscopic selection is comparable to the hyaluronic acid binding method in selecting spermatozoa for male infertility patients

Taiwanese Journal of Obstetrics & Gynecology, 2015
Objective: To evaluate if hyaluronic acid (HA)-bound spermatozoa surpassed conventional microscopy-selected spermatozoa in the status of sperm DNA integrity by acridine orange (AO) fluorescence staining.
Meng-Ting Huang, Robert Kuo-Kuang Lee, Chung-Hao Lu, Ying-Jie Chen, Sheng-Hsiang Li, Yuh-Ming Hwu   +5 more
doaj   +1 more source

Frequency of Sperm DNA Fragmentation According to Selection Method: Comparison and Relevance of a Microfluidic Device and a Swim-up Procedure [PDF]

Journal of Clinical and Diagnostic Research, 2015
Introduction: Multiple rounds of centrifugation or washing spermatozoa can cause sperm DNA fragmentation (SDF); however, a microfluidic approach to select spermatozoa does not require centrifugation.
Kanako Kishi, Hiromi Ogata, Seiji Ogata, Yuri Mizusawa, Eri Okamoto, Yukiko Matsumoto, Shoji Kokeguchi, Masahide Shiotani   +7 more
doaj   +1 more source

Viscous Cervical Environment-on-a-Chip for Selecting High-Quality Sperm from Human Semen

Biomedicines, 2021
When ejaculated sperm travels through the vagina to the uterus, mucus secreted by the cervical canal generally filters out sperm having low motility and poor morphology.
Manhee Lee, Jin Woo Park, Dongwon Kim, Hyojeong Kwon, Min Jeong Cho, Eun Ji Lee, Tai Eun Shin, Dae Keun Kim, Seungki Lee, Do Gyeung Byeun, Jung Jae Ko, Jae Ho Lee, Jung Kyu Choi   +12 more
doaj   +1 more source

Maintenance of sperm variation in a highly promiscuous wild bird. [PDF]

PLoS ONE, 2011
Postcopulatory sexual selection is an important force in the evolution of reproductive traits, including sperm morphology. In birds, sperm morphology is known to be highly heritable and largely condition-independent.
Sara Calhim, Michael C Double, Nicolas Margraf, Tim R Birkhead, Andrew Cockburn   +4 more
doaj   +1 more source

Sperm morphology and DNA fragmentation after zona pellucida selection

Reproduction and Fertility, 2021
Sperm DNA fragmentation (SDF) and sperm morphological defects can negatively affect ART outcomes. Consequently, there is a need for additional semen processing technique that accounts for sperm DNA status and morphology prior to ICSI.
Rumiana Ganeva, Dimitar Parvanov, Denitsa Velikova, Magdalena Vasileva, Kristina Nikolova, Georgi Stamenov   +5 more
doaj   +1 more source

Assessment of the effectiveness of methods for the selection of sperm with increased DNA fragmentation in ART cycles [PDF]

BIO Web of Conferences
Sperm DNA stability is significant in male infertility and favorable reproductive outcomes. Increased DNA fragmentation in spermatozoa can negatively affect the fertilization potential and the kinetics of embryo development.
Leontyeva Eugene, Kim Alena, Zastavskiy Ivan, Yakhyarova Mukhabbat, Polumiskov Vadim   +4 more
doaj   +1 more source

Differential sperm expenditure reveals a possible role for post-copulatory sexual selection in a lekking moth

, 2013
Cordes N, Yiğit A, Engqvist L, Schmoll T. Differential sperm expenditure reveals a possible role for post-copulatory sexual selection in a lekking moth. Ecology and Evolution.
Yiğit, Arzu, Tim Schmoll, Schmoll, Tim, Cordes, Nils ; https://orcid.org/, Arzu Yiğit, Leif Engqvist, Nils Cordes, Engqvist, Leif ; https://orcid.org/   +7 more
core   +1 more source

Sexual selection and sex allocation in a simultaneous hermaphrodite [PDF]

, 2010
Since Darwin’s pioneering work, sexual selection theory has become a unifying framework in evolutionary biology successfully explaining the variation in sexual dimorphism, reproductive strategies and mating systems. Although, it has long been argued that
Janicke, Tim
core   +1 more source

Experimental evolution of sperm competitiveness in a mammal

BMC Evolutionary Biology, 2011
Background When females mate with multiple partners, sperm from rival males compete to fertilise the ova. Studies of experimental evolution have proven the selective action of sperm competition on male reproductive traits.
Simmons Leigh W, Firman Renée C
doaj   +1 more source

Measuring Pre- and Post-Copulatory Sexual Selection and Their Interaction in Socially Monogamous Species with Extra-Pair Paternity

Cells, 2021
When females copulate with multiple males, pre- and post-copulatory sexual selection may interact synergistically or in opposition. Studying this interaction in wild populations is complex and potentially biased, because copulation and fertilization ...
Emily Rebecca Alison Cramer
doaj   +1 more source