Results 41 to 50 of about 27,519 (246)

INSL3 Expression in Leydig Cells is a Biomarker for Immunocastration in Boars: Transcriptional Evidence

Andrology, EarlyView.
ABSTRACT Background Study aimed to obtain insights into physiological responses to immunocastration in pubertal boars by evaluating effects of alternative vaccination protocols and identifying a reliable immunocastration biomarker. Objectives It was hypothesized that the timing of gonadotropin‐releasing hormone (GnRH) suppression by immunocastration ...
Nina Batorek Lukač, Martin Škrlep, Klavdija Poklukar, Petra Ferjan, Volker Stefanski, Gregor Fazarinc, Milka Vrecl   +6 more
wiley   +1 more source

The Effect of Cholesterol‐Loaded Cyclodextrin and Resveratrol Compounds on Post‐Thawing Quality of Ram Semen

Veterinary Medicine and Science
Ram sperm are more vulnerable to freezing than those of most other farm animals. During sperm freezing, the cell membrane loses some of its cholesterol, which regulates signalling mechanisms and prevents premature capacitation.
Eser Ahmet, Arıcı Ramazan, Yağcıoğlu Selin, Sandal Asiye İzem, Ersoy Nur, Demir Kamber, Evecen Mithat, Ak Kemal   +7 more
doaj   +1 more source

Comparative assessment of thawing methods for frozen rooster sperm

Frontiers in Veterinary Science
IntroductionCryopreservation, widely used in commercial poultry breeding, often reduces sperm motility, viability, and DNA integrity due to cryopreservation-induced damage.
Mustafa Yigit Nizam, Murat Selçuk, Murat Kirikkulak   +2 more
doaj   +1 more source

Effect of 7-dehydrocholesterol and cholesterol-loaded cyclodextrins on bull sperm motility during short term storage [PDF]

Kafkas Universitesi Veteriner Fakültesi Dergisi, 2017
The study was conducted to determine the effect of 7-dehydrocholesterol loaded cyclodextrin (7-DHCLC) and cholesterol-loaded cyclodextrin (CLC) on changes of bull sperm motility during short term storage (+4°C).
İNANÇ ME, TEKİN K, OLĞAÇ KT, ÖZEN D, STELLETTA C, UYSAL O, DAŞKIN A   +6 more
doaj   +1 more source

Seasonal effect on semen quality of Limousine and Simmental bulls

Journal of the Indonesian Tropical Animal Agriculture, 2022
This study aimed to determine the effect of breed and season on the semen quality of AI bulls. The material used was n= 78,648 records of ejaculated semen from 85 Limousine and 88 Simmental bulls collected between period 2010 and 2020.
F. R. Hapsari, D. Samsudewa, E. T. Setiatin, Y. S. Ondho, A. Setiaji, T. Harsi, I. Z. Irfan, O. Syamsono, E. Sukmawati   +8 more
doaj   +1 more source

Pig Seminal Plasma Extracellular Vesicles Enhance Motility During Preservation of Epididymal Spermatozoa but Impair Capacitation and IVF Parameters

Andrology, EarlyView.
ABSTRACT Background Extracellular vesicles (EVs) produced by accessory sex glands play a key role in sperm functionality, influencing motility, viability, acrosome integrity, metabolic activity, and capacitation. Most studies on the effects of EVs on spermatozoa have focused on ejaculated spermatozoa, which have already been exposed to their own native
Ana Moya‐Fernández, Santa María Toledo‐Guardiola, Peter Silke, Sergio Navarro‐Serna, Carmen Matás   +4 more
wiley   +1 more source

Which is more effective in thawing frozen rooster sperm: varying temperature or duration?

Frontiers in Veterinary Science
IntroductionCryopreservation of poultry sperm is crucial for preserving genetic diversity and protecting endangered breeds. Rooster sperm is highly sensitive to cryopreservation due to its high polyunsaturated fatty acid content, making it prone to ...
Mustafa Yiğit Nizam, Murat Selçuk, Burcu Esin   +2 more
doaj   +1 more source

Conception Rates of Holstein-Friesian Cows Inseminated Artificially with Reducing Frozen Semen Doses

Media Peternakan, 2016
Conception rates of Holstein Friesian (HF) acceptors were evaluated in artificial insemination (AI) mating using three frozen semen doses of the straws per volume of 0.25 cc.
Anneke Anggraeni, T. Herawati, L. Praharani, D. Utami, A. Argis   +4 more
doaj   +1 more source

The effect of green tea extract supplementation in bull semen cryopreservation [PDF]

Kafkas Universitesi Veteriner Fakültesi Dergisi, 2019
This study aims to investigate the effect of catechin (CT), green tea extract, as a supplement to Tris extender on semen quality parameters in frozen-thawed of bull sperm. Ejaculates were taken with artificial vagina from Holstein bulls and divided equal
Muhammed Enes İNANÇ, Beste ÇİL, Deniz YENİ, Fatih AVDATEK, Durmuş ORAKÇI, Pürhan Barbaros TUNCER, Ruhi TÜRKMEN, Umut TAŞDEMİR   +7 more
doaj   +1 more source

Between Exclusion and Legitimacy: Identity Negotiation and Ethical Dilemmas of Chinese Lesbians in the Assisted Reproduction System

Developing World Bioethics, EarlyView.
ABSTRACT In China's current assisted reproduction system, marriage and sexual orientation serve as key entry barriers, leaving lesbians facing institutional exclusion under the dual identities of “unmarried” and “non‐heterosexual.” The marriage system, heterosexual norms, and technical regulations jointly construct the institutional structure that ...
Yuan Liu
wiley   +1 more source