Results 151 to 160 of about 83,183 (339)

Comparison Between Different DNA and Conventional

مجله كليه طب الكندي, 2012
Background: The discriminative power of the classical WHO parameters in relation to male fertility is quite low, because they only address few aspects of sperm quality and function.
Estabraq . , A Rasool1, Omar . , F Abdul-Rasheed1, Ali F. AL-Hashimi   +2 more
doaj  

Structural and Ultrastructural Assessment of the Sperm Annulus in Men with Immotile Short-tail Sperm Defects Compared to Normozoospermic Controls: A Case–control Study

Journal of Human Reproductive Sciences
Background: The sperm annulus is a fibrous ring structure formed by septin proteins. It connects the mid-piece and principal piece of the sperm flagellum in mammals and plays a crucial role in flagellar stability and motility Aim: This study aimed to ...
Mahsa Allahgholi, Alemeh Rafaee, Mohammad Ali Sadighi Gilani, Marjan Sabbaghian   +3 more
doaj   +1 more source

Sperm competition and sperm length in shorebirds [PDF]

, 1999
Briskie, J V, Johnson, D D P
core   +1 more source

Using Whole-Group Metabolic Rate and Behaviour to Assess the Energetics of Courtship in Red-Sided Garter Snakes

, 2017
Reproductive effort is an important aspect of life history as reproductive success is arguably the most important component of fitness. Males tend to compete for access to females and, in the process, expend their energetic capital on mate searching ...
Friesen, Christopher R., Mason, Robert T., Powers, Don   +2 more
core  

Synergistic Toxicity of Low‐Concentration Metal Mixture on Male Rats: Reproductive, Renal, and Hepatic Effects

Environmental Toxicology, EarlyView.
ABSTRACT Mining plays a crucial role in economic development, but improper management can lead to severe environmental degradation. Particularly for iron ore, mining generates vast amounts of tailings often stored in unstable dams. This study aims to investigate the toxicological impacts of environmentally relevant concentrations of metals mixture ...
Kalinka Helóra Gomes de Almeida, Thalita Tofanin Sargiani D'Assumpção, Ana Priscila Gomes Silva, Carolina Rocha Moreira de Oliveira, Tailisi Hoppe Trevizani, Rubens Cesar Lopes Figueira, Lucas Buruaem Moreira, Juliana Elaine Perobelli   +7 more
wiley   +1 more source

DETECTION OF PLASMA MEMBRANE PHOSHATIDYLSERINE TRANSLOCATION IN RAM SPERMATOZOA AFTER IN VITRO TREATING WITH DEXAMETAZONE [PDF]

Journal of Central European Agriculture, 2006
In vitro induced apoptosis by dexamethazone treating of ram spermatozoa provoked the phospatidylserine exposure which is mainly localized on sperm tail region of plasma membrane and is correlated negatively with the sperm motility and survival rate.
Maria IVANOVA-KICHEVA, Alexander DIMITROV, Ivan NIKOLOV, Denitza DASKALOVA, Antoaneta BELCHEVA   +4 more
doaj  

Relationship between the Length of Sperm Tail Mitochondrial Sheath and Fertility Traits in Boars Used for Artificial Insemination. [PDF]

Antioxidants (Basel), 2020
Kerns K, Jankovitz J, Robinson J, Minton A, Kuster C, Sutovsky P.   +5 more
europepmc   +1 more source

Juvenile and Pubertal Exposure to Polystyrene Nanoplastics Impairs Epididymal Structure and Sperm Quality in Mice

Environmental Toxicology, EarlyView.
ABSTRACT Nanoplastics (NPs) are emerging environmental contaminants capable of crossing biological barriers, accumulating in tissues, and disrupting physiological pathways. The male reproductive system is particularly vulnerable during the postnatal period, a developmental window characterized by intense testicular differentiation and epididymal ...
Gabriel Magalhães Oliveira Rigo, Nicoly Caixêta Gonçalves, Cristiana Livramento Oliveira Pinto, Patrícia Corona Lopes, Raul Silva Santarem, Juliana Reis Machado, Régia Caroline Peixoto Lira, Ana Paula Ramos, Marcos Vinicius da Silva, Hugo Felix Perini, Gláucia Eloisa Munhoz de Lion Siervo   +10 more
wiley   +1 more source

Effect of butorphanol in combination with xylazine during castration of calves: A randomised trial under field conditions

Veterinary Record, EarlyView.
Abstract Background In horses, cats and dogs, the opioid butorphanol has been proven effective in management of visceral pain and for peri‐ and postoperative pain relief. The aim of this study was to evaluate physiological responses and indicators of noxious stimuli when adding butorphanol to xylazine for sedation of bull calves during surgical ...
Axel Sannö, Lovisa Snygg, Maja Wiklund, Görel Nyman   +3 more
wiley   +1 more source

Factors associated with the reproductive performance of ewes inseminated laparoscopically in England and Wales: A longitudinal study

Veterinary Record, EarlyView.
Abstract Background Laparoscopic intrauterine artificial insemination (Lap‐AI) is used in sheep genetic improvement programmes. However, the lambing rate (LR) (i.e., the proportion of inseminated ewes that lamb) following Lap‐AI is variable. Previously, one small UK study investigated factors associated with LR, but it did not adjust for dependencies ...
Mike J. Glover, Laura E. Green, Rachel Clifton   +2 more
wiley   +1 more source