Testis tortion in the newborn (especially antenatal testis tortion) is observed very rarely and constitutes 10-12% of childhood testis tortions. In testis tortion, firm and painless testicular tissue is palpated on physical examination. Doppler ultrasonography is a sensitive method in the diagnosis. In cases of neonatal testis tortion, the testis can be saved with appropriate surgical explorati...

A number of studies have indicated that testicular macrophages play an important role in regulating steroidogenesis of Leydig cells and maintain homeostasis within the testis. The current paper deals with macrophages (CD68 positive cells) and Leydig cells in patients with nonobstructive azoospermia (NOA). Methods employed included histological analysis on semi- and ultrathin sections, immunohis...

ENWEndNote BIBJabRef, Mendeley RISPapers, Reference Manager, RefWorks, Zotero AMA Wolak P, Piotrowska A, Strzelecka et al. Analysis of volume change the testis after inguinal hernia repair using PIRS method – a prospective pilot study. Medical Studies/Studia Medyczne. 2022;38(2):124-131. doi:10.5114/ms.2022.117656. APA Wolak, P., Piotrowska, A., Strzelecka, Cierniak, P. & Władyszewski, Ł. (2022...

Inhibin B is produced by Sertoli cells, provides negative feedback on FSH secretion, and may prove to be an important marker for the functioning of seminiferous tubules. The purpose of the present study was to examine the relationship between the spermatogenic function of the testis of subfertile men and the plasma concentrations of inhibin B and FSH. These parameters were estimated in a group ...

INTRODUCTION Main categorisation of azospermic is in two grups: nonobstructive azoospermia (NOA) and obstructive azoospermia (OA). We had evaluation of prognostic factors and determinants in sperm retrieval procedures in azoospermic patients. METHODS Retrospective evaluation observed 21 selected patients with NOA and OA azoospermia, after that complete history, physical examination with ultar...

PURPOSE Patients with cryptorchidism can have such short spermatic vessels that it is impossible to place the testicle in a satisfactory scrotal position using conventional orchiopexy. In these cases the most commonly used operation is 1 to 2-stage Fowler-Stephens orchiopexy. We present our surgical experience using staged inguinal orchiopexy without section of the spermatic vessels in patients...

Spermatogenic damage may occur after vasectomy, and the damage is pressure mediated, occurring when the occluded reproductive tract is unable to accommodate additional sperm produced by the testis. This study aimed to determine the long-term effect of vasectomy on spermatogenesis in humans and clarify how the balance between sperm production in the testis and sperm storage in or removal from th...

A total of Thirty Nigerian indigenous genotypes of the domestic fowl, aged between 22-25 weeks were used to evaluate the biometry of male genitalia and internalorgan characteristics.The result showed significant (p<0.05) effect of genotype, on right epididymis weight with naked neck having a higher mean value of 0.17± 0.60g and normal feather with least value of 0.14± 0.03g. The paired vas defe...

While early models of ejaculate allocation predicted that both relative testes and ejaculate size should increase with sperm competition intensity across species, recent models predict that ejaculate size may actually decrease as testes size and sperm competition intensity increase, owing to the confounding effect of potential male mating rate. A recent study demonstrated that ejaculate volume ...

Sperm competition is widely recognized as a potent force in evolution, influencing male behavior, morphology, and physiology. Recent game theory analyses have examined how sperm competition can influence the evolution of ejaculate expenditure by males and the morphology of sperm contained within ejaculates. Theoretical analyses rest on the assumption that there is sufficient genetic variance in...