Results 91 to 100 of about 1,138,325 (289)

Male reproductive system in stenopodidean shrimps: Unveiling basal reproductive traits in shrimp‐like Pleocyemata (Stenopodidae and Spongicolidae)

The Anatomical Record, EarlyView.
Abstract Stenopodidea represents one of the basal lineages within Pleocyemata, yet the male reproductive system (MRS) of this group remains poorly understood, with limited information available regarding its morphology and function. This study provides the first detailed description of the MRS in four stenopodidean shrimp species from two families ...
Caio Santos Nogueira, Lucas Rezende Penido Paschoal, Fernando José Zara   +2 more
wiley   +1 more source

THE EFFECTS OF NICOTINE EXPOSURE PER INHALATION TO THE CHANGE OF MOTILITY AND MORPHOLOGY OF THE RAT’S SPERM

Jurnal Urologi Indonesia, 2019
Objective: Smoking are known to have detrimental effect on sperm. The effects are suspiciously come from nicotine as its main pharmacologic component. This study is carried out to analyze the effect of nicotine exposure per inhalation to the difference ...
Puruhito Eko Nugroho, Fikri Rizaldi, Wahjoe Djati Soesanto   +2 more
doaj   +1 more source

Automatic classification of the acrosome status of boar spermatozoa using digital image processing and LVQ [PDF]

, 2006
We consider images of boar spermatozoa obtained with an optical phase-contrast microscope. Our goal is to automatically classify single sperm cells as acrosome-intact (class 1) or acrosome-damaged (class 2).
Petkov, Nicolai, Biehl, Michael,, Alegre, Enrique,, Petkov, Nicolai,, Sanchez, Lidia, Biehl, Michael; id_orcid, Sánchez, Lidia,, Alegre, Enrique, Biehl, Michael   +8 more
core   +3 more sources

Morphophysiological dynamics of the proximal post‐testicular ducts in Crotalus durissus Linnaeus, 1758 (Squamata: Viperidae)

The Anatomical Record, EarlyView.
Abstract The organization and function of reptilian excurrent ducts remain poorly characterized, particularly in Neotropical snakes. We provide the first integrative morphological, histochemical, immunohistochemical, and ultrastructural analysis of the proximal post‐testicular ducts of Crotalus durissus across reproductive stages.
Flávia Cappuccio de Resende, Gustavo Caldeira Cotta, Clara d' Ávila Fonseca Paiva de Paula Freitas, Leonardo Carvalho, Heloísa Helena Marques Oliveira, Victória Gomes Carvalho Silva, Lívia de Fátima Moreira Silva, Luciana Maria Silva, Samyra Maria dos Santos Nassif Lacerda, Guilherme Mattos Jardim Costa   +9 more
wiley   +1 more source

The Comparison of HA Binding and Zeta Methods Efficiency in Selection of Sperm with Normal Morphology and Intact Chromatin

مجله دانشکده پزشکی اصفهان, 2009
Background: Sperm selection for ICSI is based on morphology and motility, but these parameters may not relevant chromatin integrity. One of the sperm selection methods for ICSI is based on sperm functional characteristics.
Mohammad Reza Deemeh, Mohammad Hossein Nasr-Esfahani, Shahnaz Razavi, Habibollah Nazem, Mahnaz Shayeste Moghadam, Marziye Tavalaee   +5 more
doaj  

Variable grouping patterns in primates: A test of the better competitor hypothesis in male Verreaux's sifaka (Propithecus verreauxi)

The Anatomical Record, EarlyView.
Abstract Intraspecific variation in social organization (IVSO) within primate populations can arise due to male mating competition. Verreaux's sifaka (Propithecus verreauxi) populations exhibit both single‐male and multi‐male groups, providing an opportunity to examine the relationship between male competitive ability and social organization.
Lemeng Li, Stacey R. Tecot, Rebecca J. Lewis   +2 more
wiley   +1 more source

Importance of sperm morphology during sperm transport and fertilization in mammals

Asian Journal of Andrology, 2016
After natural or artificial insemination, the spermatozoon starts a journey from the site of deposition to the place of fertilization. However, only a small subset of the spermatozoa deposited achieves their goal: to reach and fertilize the egg. Factors involved in controlling sperm transport and fertilization include the female reproductive tract ...
García-Vázquez, F.A., Gadea, J., Matás, C., Holt, W.V.   +3 more
openaire   +4 more sources

High rate of isolated teratospermia in a population of fertile men and the questionable clinical utility of sperm morphology

F&S Reports
Objective: To better understand the impact of sperm morphology on fertility by assessing sperm morphology in a population of known fertile men. Design: A prospective cohort study. Setting: Fertility center associated with the university.
Lucille G. Cheng, B.A., David Miller, M.D., Daniel Pelzman, M.D., Anna Wecht, R.N., Kathleen Hwang, M.D.   +4 more
doaj   +1 more source

Sperm transfer and paternity in the scorpionfly Panorpa cognata: large variance in traits favoured by postcopulatory episodes of sexual selection [PDF]

, 2007
Engqvist L, Dekomien G, Lippmann T, Epplen JT, Sauer KP. Sperm transfer and paternity in the scorpionfly Panorpa cognata: large variance in traits favoured by postcopulatory episodes of sexual selection. Evolutionary Ecology.
Sauer, Klaus Peter, Epplen, Jörg T., Lippmann, Tania, Dekomien, Gabriele, Engqvist, Leif ; https://orcid.org/   +4 more
core   +1 more source

Hormonal control and signaling of the testis of the bat Molossus molossus during the processes of testicular maturation, regression, and recrudescence

The Anatomical Record, EarlyView.
Abstract Molossus molossus, a species of neotropical bat belonging to the Molossidae family, has an annual reproductive cycle that includes two peaks of spermatogenic activity, one in April and another in September, and a period of total testicular regression in December.
Emília M. Soares, Juliana F. Ferraz, Cornélio S. Santiago, Larissa P. R. Venâncio, Arlindo G. Macedo‐Junior, Sebastião R. Taboga, Mateus R. Beguelini   +6 more
wiley   +1 more source