Results 61 to 70 of about 8,317 (213)

Cytogenetic analysis and endocrine profile in patients with nonobstructive azoospermia or severe oligozoospermia

African Journal of Urology, 2018
Objective: To study the prevalence of chromosomal anomalies in infertile males with severe oligozoospermia or non obstructive azospermia and its correlation with clinical and endocrine profile. Patients and methods: Consecutive 30 male subjects (mean age
M.H. Ali, M. Soliman, A. Metwally, A. Ghobeish   +3 more
doaj   +1 more source

Prevalence of Y chromosome deletions in a Brazilian population of nonobstructive azoospermic and severely oligozoospermic men [PDF]

, 2003
We determined the prevalence of Y chromosome deletions in a population of 60 Brazilian nonobstructive azoospermic and severely oligozoospermic men. PCR-based screening of microdeletions was performed on lymphocyte DNA for the presence of 14 sequence ...
Avellar, Maria Christina Werneck, Cedenho, Agnaldo Pereira, Fraietta, Renato, Porto, Catarina Segreti, Spaine, Deborah Montagnini, Srougi, Miguel, São Pedro, Simone Lima   +6 more
core   +2 more sources

Semen quality in patients with testicular cancer is associated with age and with greatly elevated levels of beta human chorionic gonadotropin

Andrology, EarlyView.
Abstract Background Poor semen quality is a well‐known feature in patients with testicular germ cell tumours (GCTs) at the time of diagnosis but the underlying biological reasons are incompletely understood. Objectives This study aimed to identify GCT‐specific clinical factors that are involved with poor semen quality in GCT patients.
Klaus‐Peter Dieckmann, Johanna Hochmuth‐Tisch, Andrea Salzbrunn, Cord Matthies, Kathrein von Kopylow, Marta Godlewska, Christian Wülfing, Uwe Pichlmeier, Armin Soave, Christian Guido Ruf   +9 more
wiley   +1 more source

Distribution and number of Cajal-like cells in testis tissue with azoospermia

Kaohsiung Journal of Medical Sciences, 2017
We investigated the number and distribution of Cajal-like cells in patients with azoospermia. A total of 99 patients with non-obstructive azoospermia were divided into subgroups [19 patientsin hypospermatogenesis group (S1), 40 patients in maturation ...
Eray Hasirci, Tahsin Turunc, Nebil Bal, Mehmet Resit Goren, Huseyin Celik, Enis Kervancioglu, Ayhan Dirim, Mustafa Agah Tekindal, Hakan Ozkardes   +8 more
doaj   +1 more source

Search and identification of spermatozoa and spermatids in the ejaculate of non-obstructive azoospermic patients [PDF]

, 2005
OBJECTIVE: To search and to identify spermatozoa and spermatids, present in the ejaculate of non-obstructive azoospermic patients. MATERIALS AND METHODS: 27 patients, aged between 18 and 48 years, with initial diagnosis compatible with non-obstructive ...
Buttignol, Marcia H.p. [UNIFESP], Cedenho, Agnaldo Pereira [UNIFESP], Fraietta, Renato [UNIFESP], Ortiz, Valdemar [UNIFESP], Spaine, Deborah M. [UNIFESP], Srougi, Miguel [UNIFESP], Timm Jr, Odival [UNIFESP]   +6 more
core   +3 more sources

Development of a nomogram for sperm retrieval at microTESE for idiopathic non‐obstructive azoospermia in a multi‐center cohort study

Andrology, EarlyView.
Abstract Background Non‐obstructive azoospermia (NOA) affects approximately 10% of infertile men and represents a major challenge in assisted reproductive technology (ART). A model that includes histological variants could be helpful in predicting sperm retrieval rate (SRR) after microdissection testicular sperm extraction (mTESE) in patients affected ...
Giorgio Ivan Russo, Edoardo Pozzi, Fausto Negri, Marco Falcone, Emanuele Zupo, Mirko Preto, Maria Giovanna Asmundo, Sandrine Chamayou, Murat Dursun, Ateş Kadıoğlu, Andrea Salonia   +10 more
wiley   +1 more source

Whole Exome Sequencing Identifies Genes Associated With Non-Obstructive Azoospermia

Frontiers in Genetics, 2022
Background: Non-obstructive azoospermia (NOA) affects nearly 1% of men; however, the landscape of the causative genes is largely unknown. Objective: To explore the genetic etiology which is the fundamental cause of NOA, a prospective ...
Zhang, Hongguo, Li, Wei, Jiang, Yuting, Li, Jia, Chen, Mucheng, Wang, Ruixue, Zhao, Jing, Peng, Zhiyu, Huang, Hui, Liu, Ruizhi   +9 more
openaire   +3 more sources

Update on male reproductive endocrinology. [PDF]

, 2018
Practitioners of male reproductive and sexual medicine must have an intimate understanding of the physiology of male reproductive endocrinology, as such a knowledge is the cornerstone on which hormonal treatments are based.
Clavijo, Raul, Hsiao, Wayland
core   +1 more source

Sperm glyceraldehyde 3-phosphate dehydrogenase gene expression in asthenozoospermic spermatozoa [PDF]

, 2017
It has been suggested that the energy required for sperm motility is produced by oxidative phosphorylation while glycolysis seems to be an important source for ATP transmission along the flagellum.
Coltrinari, Giulia, Gallo, Mariagrazia, Gandini, Loredana, Lenzi, Andrea, Lombardo, Francesco, Paoli, Donatella, Pelloni, Marianna   +6 more
core   +1 more source

Seminal Plasma Exosomal miRNA Profiling Reveals hsa‐miR‐7‐5p as a Key Regulator of Sperm Motility in Asthenozoospermia

Andrology, EarlyView.
ABSTRACT Background Asthenozoospermia is a significant contributing factor to male infertility. Accumulating evidence indicates that impaired sperm motility is closely linked to dysregulated microRNA expression during spermatogenesis. Seminal plasma exosomes are enriched with diverse microRNAs, which play pivotal roles in modulating sperm motility, the
Zhi‐Jian Zhu, Meng‐Li Cui, Wen‐Jing Yuan, Jia‐Ning Zhang, Shuo Zhang, Xi‐Qiao Yao, Ruo‐Qing Li, Jin‐Feng Li, En‐Zhong Li   +8 more
wiley   +1 more source