Results 11 to 20 of about 32,366 (262)

A proteomic analysis on human sperm tail: comparison between normozoospermia and asthenozoospermia [PDF]

Journal of Assisted Reproduction and Genetics, 2015
Ataallah Ghadiri, Susan Sabbagh, Mahmoud Orazizadeh   +2 more
exaly   +2 more sources

A study of sperm quality assessment: Morphological defect in patients with normal sperm count

National Journal of Physiology, Pharmacy and Pharmacology, 2023
Background: Sperm morphology is the major benchmark in assessment of male infertility. There are limited studies available on frequency of qualitative defects of sperm in patients with normal sperm count.
Alpeshkumar M Maru, Yagnik P Tank, Bansari Y Tank, Amar R Shah, Anandkumar A Kanasagara   +4 more
doaj   +1 more source

Pregnancy and birth after intracytoplasmic sperm injection with normal testicular spermatozoa in a patient with azoospermia and tail stump epididymal sperm

International Brazilian Journal of Urology, 2015
Main findings: An intriguing yet perplexing case report of a successful pregnancy and live birth with intracytoplasmic sperm injection using normal testicular sperm, after the finding of azoospermia in the semen analysis and discovering only tail stump ...
Betina B. Povlsen, Lin Da Aw, Rita J. Laursen, Sandro C. Esteves, Peter Humaidan   +4 more
doaj   +1 more source

Analysis of epididymal sperm from Korean native bull (Hanwoo) aged at 8 and 15 months before freezing and after thawing

Journal of Animal Reproduction and Biotechnology, 2016
The recovery of epididymal sperm in animals is considered as one of the important tools to preserve high value or endangered species. However, there are no appropriate castrating indicators such as months of age in bull, sperm morphology, and motility ...
Sung-Sik Kang, Sang-Rae Cho, Ui-Hyung Kim, Chang-Seok Park, Hyeong-Cheol Kim, Ki-Yong Chung, Seok-Dong Lee, Sun-Sik Jang, Gi-jun Jeon, Sidong Kim, Myeong-Suk Lee, Byoung-Chul Yang   +11 more
doaj   +1 more source

Variation in apical hook length reflects the intensity of sperm competition in murine rodents. [PDF]

PLoS ONE, 2013
BackgroundPost-copulatory sexual selection has been shown to shape morphology of male gametes. Both directional and stabilizing selection on sperm phenotype have been documented in vertebrates in response to sexual promiscuity.MethodologyHere we ...
Martin Šandera, Tomáš Albrecht, Pavel Stopka   +2 more
doaj   +1 more source

The coupling apparatus of the sperm head and tail†

Biology of Reproduction, 2020
AbstractA strong sperm head–tail coupling apparatus (HTCA) is needed to ensure the integrity of spermatozoa during their fierce competition to fertilize the egg. A lot of HTCA-specific components have evolved to strengthen the attachment of the tail to the implantation fossa at the sperm head.
Bingbing, Wu, Hui, Gao, Chao, Liu, Wei, Li   +3 more
openaire   +2 more sources

CCDC42 Localizes to Manchette, HTCA and Tail and Interacts With ODF1 and ODF2 in the Formation of the Male Germ Cell Cytoskeleton

Frontiers in Cell and Developmental Biology, 2019
Terminal differentiation of male germ cells into functional spermatozoa requires shaping and condensation of the nucleus as well as the formation of sperm-specific structures. A transient microtubular structure, the manchette, is mandatory for sperm head
Constanza Tapia Contreras, Sigrid Hoyer-Fender   +1 more
doaj   +1 more source

Artificial flexible sperm-like nanorobot based on self-assembly and its bidirectional propulsion in precessing magnetic fields

Scientific Reports, 2021
Sperm cells can move at a high speed in biofluids based on the flexible flagella, which inspire novel flagellar micro-/nanorobots to be designed. Despite progress in fabricating sperm-type robots at micro scale, mass fabrication of vivid sperm-like ...
Nuoer Celi, De Gong, Jun Cai
doaj   +1 more source

CRISPs Function to Boost Sperm Power Output and Motility

Frontiers in Cell and Developmental Biology, 2021
Fertilization requires sperm to travel long distances through the complex environment of the female reproductive tract. Despite the strong association between poor motility and infertility, the kinetics of sperm tail movement and the role individual ...
Avinash S. Gaikwad, Avinash S. Gaikwad, Ashwin Nandagiri, Ashwin Nandagiri, David L. Potter, Reza Nosrati, Anne E. O’Connor, Anne E. O’Connor, Sameer Jadhav, Julio Soria, Ranganathan Prabhakar, Moira K. O’Bryan   +11 more
doaj   +1 more source

Association between fine particulate matter bound polycyclic aromatic hydrocarbons and DNA damage of male sperm in Chongqing

Di-san junyi daxue xuebao, 2021
Objective To investigate the association between exposure to polycyclic aromatic hydrocarbons(PAHs) in atmospheric fine particulate matter(PM2.5) and sperm DNA damage in Chongqing.
ZHOU Niya, ZHOU Niya, CHEN Qing
doaj   +1 more source