Results 151 to 160 of about 21,382 (249)

Beyond Body Mass, Beyond Adulthood: The Ontogeny of Sexual Size Monomorphism

American Journal of Biological Anthropology, Volume 190, Issue 1, May 2026.
ABSTRACT Objectives Contest competition for mates and female reproductive energetics influence body size and sexual dimorphism across many primates; nevertheless, some monomorphic species defy these patterns. These deviations may reflect biological anthropology's focus on body mass and adult size as defining features of sexual dimorphism.
Gabrielle L. Bueno, Stacey R. Tecot, Rebecca J. Lewis   +2 more
wiley   +1 more source

Testicular sperm aspiration (TESA) outcome in Middle Eastern patients with non-obstructive azoospermia: a retrospective cohort study

Middle East Fertility Society Journal
Background Infertility is an important health problem, affecting couples worldwide. Non-obstructive azoospermia is the most severe form of azoospermia, which is mostly idiopathic or caused by different causes such as chemotherapy and genetic disorders ...
Manal Alquobaili, Shahd Hamsho, Marwan Alhalabi   +2 more
doaj   +1 more source

Protective effect of Sildenafil on contralateral epididymal sperm concentration and motility following unilateral blunt testicular trauma in pre-pubertal male mice [PDF]

, 2015
Background and aims: Blunt testicular trauma adversely affects fertility in later periods. The purpose of the present study was to examine the effect of sildenafil on contralateral epididymal sperm count and motility following unilateral blunt testicular
Behfar, Mehdi., Moeini Moghaddam, Reza., Najafi, Gholamreza., Shalizar Jalali, Ali.   +3 more
core  

Molecular Investigations on Angiogenesis and Oxidative Stress in Roe Deer (Capreolus capreolus) Bucks' Testes Throughout the Reproductive Cycle

Journal of Experimental Zoology Part A: Ecological and Integrative Physiology, Volume 345, Issue 4, Page 351-360, May 2026.
ABSTRACT Animals with seasonal reproductive cycles, as the Roe deer (Capreolus capreolus), have developed mechanisms to synchronize reproduction with the environmental cycle in order to optimize reproductive success through melatonin. Angiogenesis and oxidative stress are key processes in spermatogenesis, contributing to testicular remodeling and ...
Ilaria Troisio, Domenico Ventrella, Bálint Lóránt Hausz, Mattia Cesauri, Niccolò Ian Vannetti, Maria Laura Bacci, Alberto Elmi, Augusta Zannoni   +7 more
wiley   +1 more source

Testicular sperm retrieval at the time of bilateral radical orchiectomy

Urology Annals, 2009
A new indication for testicular tissue cryopreservation is discussed here. We evaluate the feasibility of testicular sperm extraction during bilateral orchiectomy for testicular cancer. A 26-year-old man with a history of right orchidopexy presented with
Nassir Anmar, Grantmyre John
doaj  

Association Between Sertoli Cell-Only Syndrome, Varicocele and FSH Level in Azoospermic Patients [PDF]

, 2018
A varicocele is the most frequent causes of infertility because it causes damage to the testes that could increase the levels of FSH. The objectives of this study were to determine the relationship of varicocele history and the condition of Sertoli cell ...
Birowo, P. (Ponco), Eva, M. (Michelle), Rasyid, N. (Nur), Sari, P. (Puji)   +3 more
core  

Protective Effect of Intracellular Compounds of Lactobacillus plantarum on Goat Sperm Quality During Cryopreservation

Veterinary Medicine and Science, Volume 12, Issue 3, May 2026.
Intracellular compounds from Lactobacillus plantarum were added to a goat sperm cryopreservation extender. A concentration of 20 µL/mL improved post‐thaw sperm quality, whereas higher concentrations (80–100 µL/mL) had detrimental effects. ABSTRACT Background Cryopreservation of sperm is a key strategy for preserving and transmitting the genetic traits ...
Farshad Ariyan, Amjad Farzinpour, Abbas Farshad, Aram Sharifi   +3 more
wiley   +1 more source

From “Passive Supplementation” to “Active Repair”: Melatonin Reshapes the Treatment Paradigm for Late‐Onset Hypogonadism by Targeting Leydig Cell Senescence

Aging Cell, Volume 25, Issue 5, May 2026.
Melatonin restores testosterone production in aging Leydig cells by targeting key pathological drivers, particularly oxidative stress and mitochondrial dysfunction. This approach offers a fundamental strategy to reshape the Late‐onset hypogonadism treatment paradigm.
Hui Wu, Gang Ning, Mintao Jian, Ajian Peng, Haoyu Wang, Bonan Li, Xing Zhou   +6 more
wiley   +1 more source

Pharmacogenetics of follicle‐stimulating hormone action in the male

Andrology, Volume 14, Issue 4, Page 1064-1072, May 2026.
Abstract Male factor infertility (MFI) is involved in half of the cases of couple infertility. The follicle‐stimulating hormone (FSH) therapy is considered efficient to improve semen parameters and pregnancy rate in patients with idiopathic MFI, following the lesson learned from hypogonadotropic hypogonadism.
Andrea Graziani, Giuseppe Grande, Raffele Scafa, Riccardo Selice, Andrea Garolla, Maria Santa Rocca, Cinzia Vinanzi, Alberto Ferlin   +7 more
wiley   +1 more source

Exposing dairy bulls to high temperature-humidity index during spermatogenesis compromises subsequent embryo development in vitro [PDF]

, 2020
Broekhuijse, Marleen L.W.J., de Cássia Bicudo, Luana, de Souza Ramos Angrimani, Daniel, Demeyere, Kristel, Llamas Luceno, Núria, Meyer, Evelyne, Mullaart, Erik, Peelman, Luc, Szymańska-Vandendriessche, Katarzyna, Van Poucke, Mario, Van Soom, Ann   +10 more
core   +2 more sources