No abstract available.
Spermatogenesis*

No abstract available.
Aging* ; Humans ; Male* ; Spermatogenesis*

No abstract available.
Hydrocortisone* ; Spermatogenesis* ; Varicocele* ; Veins*

No abstract available.
Animals ; Finasteride* ; Rats* ; Spermatogenesis*

Animals ; Humans ; Male ; Spermatogenesis

The first Viet Nam baby born from intracytoplasmic sperm injection using testicular sperm from impaired spermatogenesis testes in 1/3/2004. There was approximately 50000 sperm after preparation, among them 20% was motile. From 12 retrieved oocytes, 11 were mature and therefore injected. Five oocytes fertilized and developed into 4 embryos. Embryo transfer was carried out for all 4 embryos. One embryo implanted and kept growing till the 37th week of pregnancy. Patient underwent ceasarian section
Spermatogenesis ; Sperm Retrieval ; Sperm Injections, Intracytoplasmic

AIMTo determine whether vasectomy away from the epididymal tail (via the inguinal canal) in rabbits can reduce the early postoperative effects on spermatogenesis.

METHODSTwenty-nine normal male Japanese white rabbits (aged 4-6 months) were subjected to unilateral close-ended (conventional) or open-ended (the cut end of the juxta-epididymal vas deferens not ligated) vasectomy via the inguinal canal. Ten days and 3 months after operation, testes, epididymides and vasa deferentia were removed and methacrylate resin-embedded sections prepared. The histology of the testis, epididymis and vas deferens was examined under light microscope, and the volume and diameter of the seminiferous tubules were quantitatively studied using stereological methods.

RESULTSNeither of the methods of vasectomy led to apparent damage to spermatogenesis on the vasectomized side in comparison with the contralateral sham-operated side, but the juxta-epididymal vas deferens on the vasectomized side was highly distended and contained numerous sperm 3 months after operation.

CONCLUSIONVasectomy away from the cauda epididymis has no significant early postoperative effects on spermatogenesis in rabbits.

We have performed bilateral testicular biopsies on 36 patients with varicocele and discussed the relation between histologic findings and semenogram. The results obtained in the study are as follows. 1. The volume of the semen increased more than 4.0 ml in our series by 19. 5%, and decreased below 1.5ml by 8.3%. The sperm count, motility and morphology were seen to depend on the size of varicocele 2. Testicular histology showed germinal cell hypoplasia and premature sloughing of immature cells into the lumen of the tubules, which seems to be impaired spermatogenesis. These cells are similar to those seen in the ejaculate, including tapering forms and spermatids. In most of the cases the tubular thickening was found in variable degree, and this is considered as a possible prognostic factor. Our study showed on preferential influence on testicular histology in relation to right or left side, except a few cases. The size of varicocele is no concerned with the histologic change of the testicle. 3. In comparing the histologic change of the left testicle with the semenogram, the sperm morphology was thought to be correlated with the histologic change but the count and motility were not so.
Biopsy* ; Humans ; Semen ; Sperm Count ; Spermatids ; Spermatogenesis ; Spermatozoa ; Testis ; Varicocele*

Vasectomy is one of the most common forms of male contraception throughout the world. However, more vasectomy reversals are sought each year because of the increasing number of second marriages and other causes. Before recommending vasectomy, urologists may wish to resolve in their own mind the conflict between reports that maintain the testis is harmed by vasectomy and those that slate is not. We studied a group of patients undergoing vasectomy reversal to determine whether histopathologic change on light and electron microscopy would be detected. Only one testis specimen from post-vasectomy patients showed an abnormality correlated with spermatogenesis and five cases showed mild focal interstitial fibrosis without abnormality of spermatogenesis on light and electron microscopy. We found that vasectomy has some influence to the spermatogenesis and pathologic change.
Contraception ; Fibrosis ; Humans* ; Marriage ; Microscopy, Electron ; Spermatogenesis ; Testis* ; Vasectomy* ; Vasovasostomy

Spermatogenesis in liver flukes, C. sinensis, was investigated by using light and electron microscopes. The epithelium of the testis was composed of a basement membrane, numerous lamellae protuded from the membrance and large number of spermatogonia supported by the lamellae. The lumen of the testis was filled with numerous 8, 16 and 32-cell groups representing primary spermatocytes, secondary spermatocytes and spermatids respectively. None of cell groups with over 32 or under 8 cells was noticed. The process of spermatogenesis is presumably as follows; A cell group of 8 spermatogonia, attached together by a cytophore, is separated from the testis epithelium during the growth period, thus becoming primary spermatocytes. The primary spermatocytes divide to form a cell group of 16 secondary spermatocytes giving rise to a cell group of 32 spermatids through meiotic germ cell division. The spermatids begin to undergo a spermiogenesis. The newly formed sperms remain attached together in the lumen for a while before migrating through the vasa efferentia.
parasitology-helminth-trematoda ; Clonorchis sinensis ; spermatogenesis ; morphology ; electronmicroscopy