Results 81 to 90 of about 487,985 (362)

Computerized Sperm Motility and Application of Sperm Cryopreservation [PDF]

Archives of Andrology, 1988
An objective method for measuring sperm motion characteristics was developed on an Intellect 100 Quantel Image Analysis System suitable for various image cytometric applications. It provided overall analysis of percent motility (% MS) as well as individual and mean measurements of motion characteristics, including vigor characteristics such as ...
J Auger, J P Dadoune
openaire   +3 more sources

Protein-carbohydrate interactions during fertilization [PDF]

, 1998
Interaction between gametes during fertilization is at least in part regulated by carbohydrate moieties of the zona pellucida (ZP) and carbohydrate binding proteins of the sperm surface. This review focuses on the protein-carbohydrate interactions during
Kolle, S., Plendl, J., Sinowatz, Fred
core   +1 more source

Sperm Detection and Tracking in Phase-Contrast Microscopy Image Sequences using Deep Learning and Modified CSR-DCF [PDF]

arXiv, 2020
Nowadays, computer-aided sperm analysis (CASA) systems have made a big leap in extracting the characteristics of spermatozoa for studies or measuring human fertility. The first step in sperm characteristics analysis is sperm detection in the frames of the video sample. In this article, we used RetinaNet, a deep fully convolutional neural network as the
arxiv  

Murine Models and Human Cell Line Models to Study Altered Dynamics of Ovarian Follicles in Polycystic Ovary Syndrome

Advanced Biology, EarlyView.
The manuscript examines preclinical murine and human models to study polycystic ovary syndrome (PCOS), delving into the cellular and molecular mechanisms underlying altered ovarian follicular dynamics. It explores the cellular interactions involved in normal and PCOS ovaries and outlines the current and novel strategies in the search for preclinical ...
Arturo Bevilacqua, Cristiano Giuliani, Giovanna Di Emidio, Samuel H Myers, Vittorio Unfer, Carla Tatone   +5 more
wiley   +1 more source

Single-cell RNA sequencing reveals the local cell landscape in mouse epididymal initial segment during aging

Immunity & Ageing, 2023
Background Morphological and functional alterations in aging reproductive organs result in decreased male fertility. The epididymis functions as the transition region for post-testicular sperm maturation.
Jintao Zhuang, Xiangping Li, Jiahui Yao, Xiangzhou Sun, Jiumin Liu, Hua Nie, Yang Hu, Xiangan Tu, Huang Liu, Weibing Qin, Yun Xie   +10 more
doaj   +1 more source

3D Bioprinted Coaxial Testis Model Using Human Induced Pluripotent Stem Cells:A Step Toward Bicompartmental Cytoarchitecture and Functionalization

Advanced Healthcare Materials, EarlyView.
The ability of human induced pluripotent stem cells (hiPSCs) to model developmental processes makes them a promising source for engineering testicular tissues to study in vitro maturation and sperm production. This work describes the first hiPSC‐derived testicular model and shows that it captures functional aspects of prepubertal testicular tissues ...
Meghan A Robinson, Sonia HY Kung, Khaled YM Youssef, Kali M Scheck, Robert H Bell, Funda Sar, Anne M Haegert, M Mahdi Asmae, Changfeng Cheng, Salina V Yeack, Bhairvi T Mathur, Feng Jiang, Colin C Collins, Faraz Hach, Stephanie M Willerth, Ryan K Flannigan   +15 more
wiley   +1 more source

Sperm allocation strategies in a sperm heteromorphic insect [PDF]

Current Zoology, 2019
AbstractTheories predict that in polyandrous species, the focal male should increase sperm allocation per mate in the presence of rivals to gain greater share of paternity, but in the presence of additional mates, he should reduce sperm allocation per mate to save sperm for insemination of more mates.
Xiong Zhao He, Kambiz Esfandi, Kambiz Esfandi, Qiao Wang   +3 more
openaire   +3 more sources

Male sperm whale acoustic behavior observed from multipaths at a single hydrophone [PDF]

, 2005
Sperm whales generate transient sounds (clicks) when foraging. These clicks have been described as echolocation sounds, a result of having measured the source level and the directionality of these signals and having extrapolated results from biosonar ...
Adam, Olivier, Laplanche, Christophe, Lopatka, Maciej, Motsch, Jean-François   +3 more
core   +2 more sources

Urine‐Stable Aptamer‐Conjugated Gold Nanorods for the Early Detection of High‐Grade Bladder Cancer Residual Disease

Advanced Healthcare Materials, EarlyView.
Aptamer (A) conjugated gold nanorods (B) for the recognition of bladder cancer cells expressing the integrin α5β1 (C) and the visualization of the targeted GNRs@Chit‐Apt‐Itg by photoacoustic imaging at the surface of the orthotopic bladder cancer in the preclinical model (D).
Chiara Venegoni, Silvia Tortorella, Alessandra Caliendo, Irene Locatelli, Alessia Di Coste, Erica Locatelli, Filippo Capancioni, Emanuela Bua, Simona Camorani, Andrea Salonia, Francesco Montorsi, Jithin Jose, Marco Moschini, Laura Cerchia, Mauro Comes Franchini, Massimo Alfano   +15 more
wiley   +1 more source

Does the FNA sperm retrieval failure prediction model work well for current NOA individuals undertaking risk screening before the operation? Model validation, high-risk population identification and potential alternative sperm retrieval exploration

BMC Medical Informatics and Decision Making
Background Non-obstructive azoospermia (NOA), the severe type of male infertility. The objective of this study was to evaluate the predictive accuracy of a prediction model of sperm retrieval failure with fine needle aspiration (FNA).
Xiaohui Jiang, Dingming Li, Yi Zheng, Yinxian Li, Hengzhou Bai, Guicheng Zhao, Yi Zhang, Yue Ma   +7 more
doaj   +1 more source