نتایج جستجو برای: obstructive azoospermia pirna
تعداد نتایج: 78168 فیلتر نتایج به سال:
OBJECTIVE Inhibin, activin and follistatin are glycoprotein hormones produced by the gonads. Recent studies have shown that inhibin B is the predominant form of inhibin in the circulation in men. The objective of this study was to investigate circulating levels of activin A and follistatin in disorders of spermatogenesis in men and their relationship with FSH and inhibin B. DESIGN AND METHOD ...
Both aberrant meiotic recombination and an increased frequency of sperm aneuploidy have been observed in infertile men. However, this association has not been demonstrated within individual men. The purpose of this study was to determine the association between the frequency of recombination observed in pachytene spermatocytes and the frequency of aneuploidy in sperm from the same infertile men...
Abstract Introduction Obstructive azoospermia accounts for up to 14% of patients presenting fertility evaluation. Fine-needle vasography (FNV) is a diagnostic procedure that can be performed identify an obstruction proximal the ejaculatory duct. Compared traditional vasography, FNV utilizes less-invasive method perform imaging vas deferens and distal structures. Herein we report our experience ...
Background: Telomeres are evolutionary, specialized terminal structures at the ends of eukaryotic chromosomes containing TTAGGG repeats in human. Several human diseases have been known to be associated with dramatic changes in telomere length. The aim of the present study was to assess the correlation between the relative leukocyte telomere length (LTL) and infertility in a group of Iranian azo...
OBJECTIVE To evaluate the impact of sperm defect severity and the type of azoospermia on the outcomes of intracytoplasmic sperm injection (ICSI). MATERIALS AND METHODS This study included 313 ICSI cycles that were divided into two major groups according to the source of spermatozoa used for ICSI: 1) Ejaculated (group 1; n = 220) and 2) Testicular/Epididymal (group 2; n = 93). Group 1 was subd...
Deletion of the AZFc region of the Y chromosome is the most frequent molecularly defined cause of spermatogenic failure. We report three unrelated men in whom azoospermia or severe oligozoospermia was caused by de-novo AZFc deletions, and who produced sons by intracytoplasmic sperm injection (ICSI). We employed polymerase chain reaction (PCR) assays to examine the Y chromosomes of their four in...
Cryptorchidism is the most common cause of non-obstructive azoospermia in man. In contrast to the general belief that temperature-dependent effects on the undescended gonad damage cryptorchid testes before sexual maturation is complete, molecular pathology strongly supports the theory that impaired mini-puberty is responsible for azoospermia and infertility in cryptorchidism. Molecular biologic...
VATER association was first described in 1968 by Say and Gerald and is an association of congenital anomalies including V (vertebral defect), A (anal atresia), TE (tracheoesophegeal fistula), and R (radial dysplasia and renal defects). This report described a 26 year-old man with VATER association presented with infertility. Hormone tests including follicular stimulating hormone, luteinizing ho...
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