Results 71 to 80 of about 487,985 (362)

Factors affecting sperm recovery rates and survival after centrifugation of equine semen [PDF]

, 2012
Conventional centrifugation protocols result in important sperm losses during removal of the supernatant. In this study, the effect of centrifugation force (400 or 900 × g), duration (5 or 10 min), and column height (20 or 40 mL; Experiment 1); sperm ...
Eilts, B. E., Eljarrah, A. H., Ferrer, Maria S., Lyle, S. K., Paccamonti, D. L.   +4 more
core   +2 more sources

TOD-CNN: An Effective Convolutional Neural Network for Tiny Object Detection in Sperm Videos [PDF]

arXiv, 2022
The detection of tiny objects in microscopic videos is a problematic point, especially in large-scale experiments. For tiny objects (such as sperms) in microscopic videos, current detection methods face challenges in fuzzy, irregular, and precise positioning of objects.
arxiv  

Comparison of outcomes between pulsatile gonadotropin releasing hormone and combined gonadotropin therapy of spermatogenesis in patients with congenital hypogonadotropic hypogonadism

Reproductive Biology and Endocrinology
Background To evaluate whether there was a difference in outcome between pulsatile gonadotropin releasing hormone (GnRH) therapy and human chorionic gonadotropin/human menopausal gonadotropin (hCG/HMG) therapy for induction of spermatogenesis in post ...
Yi Zheng, Heng-Zhou Bai, Gui-Cheng Zhao, Kun Tian, Jun-Tao Yue, Ding-Ming Li, Xiao-Hui Jiang   +6 more
doaj   +1 more source

Timing of hormone therapy and its association with cardiovascular risk and metabolic parameters in 4-vinylcyclohexene diepoxide-induced primary ovarian insufficiency mouse model

Gynecological Endocrinology, 2023
Objective To evaluate the effects of various initiation time points and durations of hormone therapy (HT) on cardiovascular and metabolic parameters of premenarche, primary ovarian insufficiency (POI) mouse model, induced by 4-vinylcyclohexene diepoxide ...
Hyun Joo Lee, Min Jung Park, Jeong-Doo Heo, Bo Sun Joo, Jong Kil Joo   +4 more
doaj   +1 more source

Distribution of Glycoproteins on Feline Testicular Sperm, Epididymal Sperm and Ejaculated Sperm

Journal of Veterinary Medical Science, 2011
Glycoproteins (GPs) are known to be involved in the phenomenon of sperm maturation and capacitation. In the present study, we investigated the attachment of GPs on sperm cell membrane during the process of feline sperm maturation from testicular sperm to ejaculated sperm by using 8 FITC-labeled lectins.
Toshihiko Tsutsui, Toshihiko Tsutsui, Miki Morita, Mari Toyonaga, Mari Toyonaga, Tatsuya Hori   +5 more
openaire   +3 more sources

Hydrogen sulfide repairs testicular damage induced by heat stress in rats

FEBS Open Bio, EarlyView.
Heat stress can cause testicular damage and affect fertility. We investigated the potential protective role of hydrogen sulfide (H2S) against heat stress‐induced testicular injury and observed that H2S donor NaHS can effectively restore testicular damage in rats by inhibiting inflammation and oxidative stress. Our results suggest that H2S might be used
Xinyu Guo, Yupeng Yin, Susu Guo, Xiaoyan Chen, Suyan Xie, Shiqin Chen, Yan Huang   +6 more
wiley   +1 more source

From biological marker to clinical application: the role of anti-Müllerian hormone for delayed puberty and idiopathic non-obstructive azoospermia in males

Endocrine Connections
Anti-Müllerian hormone (AMH), a biomarker secreted by Sertoli cells in the testes, has emerged as a critical indicator of male reproductive function with significant clinical application potential.
Yuanyuan Zeng, Guicheng Zhao, Yi Zheng, Xiaohui Jiang   +3 more
doaj   +1 more source

The sperm centrioles

Molecular and Cellular Endocrinology, 2020
Centrioles are eukaryotic subcellular structures that produce and regulate massive cytoskeleton superstructures. They form centrosomes and cilia, regulate new centriole formation, anchor cilia to the cell, and regulate cilia function. These basic centriolar functions are executed in sperm cells during their amplification from spermatogonial stem cells ...
Alexa Carr, Emily Lillian Fishman, Tomer Avidor-Reiss, Tomer Avidor-Reiss   +3 more
openaire   +3 more sources

Karyotypes and idiograms of sperm and pygmy sperm whales [PDF]

Hereditas, 2009
The somatic chromosomes of the sperm whale, Physeter catodon L. and the pygmy sperm whale, Kogia breviceps Blainville, were studied. The chromosome number of both species is 2n=42. The sperm and pygmy sperm whales are the only cetaceans, so far recorded, with a chromosome number deviating from 2n=44.
Ulfur Arnason, Kurt Benirschke
openaire   +3 more sources

Possible role of human ribonuclease dicer in the regulation of R loops

FEBS Open Bio, EarlyView.
R loops play an important role in regulating key cellular processes such as replication, transcription, centromere stabilization, or control of telomere length. However, the unscheduled accumulation of R loops can cause many diseases, including cancer, and neurodegenerative or inflammatory disorders. Interestingly, accumulating data indicate a possible
Klaudia Wojcik, Paulina Krzeminska, Anna Kurzynska‐Kokorniak   +2 more
wiley   +1 more source