Results 51 to 60 of about 54,369 (287)

Multiple Testicular Sampling in Non-Obstructive Azoospermia-Is it Necessary? [PDF]

open access: yesJournal of Urology, 1998
Spermatogenesis may be focal in non-obstructive azoospermia. The present study was conducted to determine whether the performance of multiple, rather than a single testicular sample contributes to obtaining spermatozoa in amounts sufficient for fertilization and cryopreservation in non-obstructive, azoospermic patients.
Ronni Gamzu   +8 more
openaire   +3 more sources

Chronic Immune-Mediated Orchitis Is the Major Cause of Acquired Non-obstructive Azoospermia in Dogs

open access: yesFrontiers in Veterinary Science, 2022
Azoospermia, the lack of spermatozoa in the ejaculate, is the most common finding in infertile but otherwise healthy male dogs and represents an increasing reproductive health issue in men, too.
Sandra Goericke-Pesch   +7 more
doaj   +1 more source

Varicoceles in Men With Non-obstructive Azoospermia: The Dilemma to Operate or Not

open access: yesFrontiers in Reproductive Health, 2022
The knowledge on male reproduction is constantly expanding, especially in treating infertility due to non-obstructive azoospermia (NOA). Varicocele is occasionally diagnosed in a subpopulation of males with NOA. Varicocele repair in NOA-men may contribute to the reappearance of spermatozoa in semen. However, spontaneous pregnancies are observed in only
Aris Kaltsas   +9 more
openaire   +3 more sources

Evaluating the Predictive Value of Diagnostic Testicular Biopsy for Sperm Retrieval Outcomes in Men with Non-Obstructive Azoospermia

open access: yesJournal of Personalized Medicine, 2023
Background: Non-obstructive azoospermia (NOA) presents a challenge in male infertility management. This study aimed to assess the efficacy of diagnostic testicular biopsy (DTB) in predicting sperm retrieval success via therapeutic testicular biopsy (TTB)
Ares Kaltsas   +9 more
semanticscholar   +1 more source

Single-cell analysis of developing and azoospermia human testicles reveals central role of Sertoli cells

open access: yesNature Communications, 2020
Non-obstructive azoospermia affects 1% of men. Here, authors perform single-cell transcriptomic analysis of human testicular cells from healthy donors and non-obstructive azoospermia patients and find that inhibition of Wnt signaling promotes the ...
LiangYu Zhao   +19 more
doaj   +1 more source

Testicular histopathology, semen analysis and FSH, predictive value of sperm retrieval: supportive counseling in case of reoperation after testicular sperm extraction (TESE) [PDF]

open access: yes, 2018
Background: To provide indicators for the likelihood of sperm retrieval in patients undergoing testicular sperm extraction is a major issue in the management of male infertility by TESE.
Basciani, S   +10 more
core   +1 more source

Genetic variants underlying spermatogenic arrests in men with non-obstructive azoospermia

open access: yesCell Cycle, 2023
Spermatogenic arrest is a severe form of non-obstructive azoospermia (NOA), which occurs in 10–15% of infertile men. Interruption in spermatogenic progression at premeiotic, meiotic, or postmeiotic stage can lead to arrest in men with NOA. Recent studies
S. Ozturk
semanticscholar   +1 more source

Testosterone to Luteinizing Hormone Ratio as a Potential Predictor of Sperm Retrieval in Non-Obstructive Azoospermia Patients

open access: yesYonsei medical journal, 2023
Purpose This study assessed the outcomes of microsurgical testicular sperm extraction (mTESE) and potential preoperative predictors of sperm retrieval (SR) in patients with non-obstructive azoospermia (NOA). Materials and Methods Clinical data of 111 NOA
Tae Jin Kim, K. Koo
semanticscholar   +1 more source

Non-obstructive idiopathic azoospermia vs azoospermia with antecedents of cryptorchidism: ways and probabilities of becoming parents [PDF]

open access: yesBasic and Clinical Andrology, 2021
Abstract Background Non-obstructive azoospermia (NOA) with history of cryptorchidism and idiopathic NOA are the most common forms of NOA without genetic aetiology. Of all patients with one of these two types of NOA, only a few will have a positive TEsticular Sperm Extraction (TESE).
Sangwan, Jacques   +6 more
openaire   +5 more sources

Reinke’s crystals in perivascular and peritubular Leydig cells of men with nonobstructive and obstructive azoospermia: a retrospective case-control study [PDF]

open access: yes, 2019
Aim To analyze the differences in the population of perivascular and peritubular Leydig cells (LC) and the number of Reinke’s crystals (RCs) in the testicles of infertile men with non-obstructive and obstructive azoospermia.
Monica Di Luca
core   +2 more sources

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