منابع مشابه
Chronology of meiosis & synaptonemal complex abnormalities in normal & abnormal spermatogenesis.
BACKGROUND & OBJECTIVES The study was taken up to define criteria of normality for meiosis by assessing the frequency of meiotic prophase cell types, the frequency of pachytene substage in normal and abnormal spermatogenesis and to determine what synaptonemal complex. METHODS A quantitative and qualitative analysis of the first meiotic prophase was performed in 10 patients presenting with non...
متن کاملCan Altered Expression of HSPA2 in Varicocele Patients Lead to Abnormal Spermatogenesis?
Background Heat shock protein A2 (HSPA2) is correlated with sperm maturity and function. Therefore, dysfunctional expression of this gene results in abnormal spermatogenesis. On the other hand, DNA damage in spermatozoa is considered to be an important cause of male infertility, and the presence of sperm with DNA fragmentation and chromatin abnormalities in human ejaculates is well documented, ...
متن کاملO-16: Human Dietary Patterns and SemenQuality
Background: Are dietary patterns, substantiated by biomarkers, associated with semen quality? Materials and Methods: In 161 men of subfertile couples undergoing in vitro fertilization treatment in a tertiary referral clinic in Rotterdam, the Netherlands, we assessed nutrient intakes and performed principal component factor analysis to identify dietary patterns. Total homocysteine (tHcy), folate...
متن کاملPhenotypic characterization of the immune and mast cell infiltrates in the human testis shows normal and abnormal spermatogenesis.
OBJECTIVE To assess the types, distributions, and numbers of immune cell infiltrates in the testes of men with azoospermia. DESIGN Prospective study. SETTING University research and clinical institutes. PATIENT(S) Thirty-one men with azoospermia showing normal spermatogenesis (n = 10), germ cell maturation arrest (GA, n = 12), and Sertoli cell-only syndrome (SCO, n = 9). INTERVENTION(S)...
متن کاملFollicle-stimulating hormone and human spermatogenesis.
The role of follicle-stimulating hormone (FSH) in the control of spermatogenesis is not well established in any species, including man. We studied the effect of an experimentally-induced, selective FSH deficiency on sperm production in normal men. After a 3-mo control period, five normal men received testosterone enanthate (T) 200 mg i. m. weekly to suppress luteinizing hormone (LH) and FSH, un...
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ژورنال
عنوان ژورنال: Human Reproduction
سال: 1999
ISSN: 1460-2350,0268-1161
DOI: 10.1093/humrep/14.suppl_3.74-a