Abstract:
:The morphological analysis of the spermatozoa from fertile and infertile men was performed using light and electron microscopy to clarify the relationship between sperm morphology and fertility. Semen samples obtained from 22 partners of pregnant women were prepared according to the protocol standardized in an international collaborative study. Semen samples from 17 patients with asthenozoospermia or varicocele were collected in a hospital. Abnormalities in the spermatozoa were classified into three types for the tails, two for the midpieces, and six for the heads according to the criteria adapted from WHO guidelines (World Health Organization, 1999: WHO laboratory manual for the examination of human semen and semen-cervical mucus interaction (4th edition)). Approximately 14% of the spermatozoa from the fertile men had abnormal tails at the light microscopic level while approximately 44% had abnormal heads. Most types of abnormalities found in the spermatozoa from the asthenozoospermic and varicocele patients were encountered in those from the fertile men, although the semen from the fertile men contained a higher percentage of normal spermatozoa than that from the patients. These results were also confirmed at the ultrastructural level. Most abnormal cell types are encountered in semen from fertile men, although the incidence of abnormalities is low.
journal_name
Mol Reprod Devjournal_title
Molecular reproduction and developmentauthors
Kubo-Irie M,Matsumiya K,Iwamoto T,Kaneko S,Ishijima Sdoi
10.1002/mrd.20189keywords:
subject
Has Abstractpub_date
2005-01-01 00:00:00pages
70-81issue
1eissn
1040-452Xissn
1098-2795journal_volume
70pub_type
杂志文章abstract::The sequence of ionic changes involved in initiation of acrosomal exocytosis in capacitated mouse spermatozoa was investigated. Earlier studies demonstrated that a large influx of Na+ is required for exocytosis, this Na+ apparently being associated with an increase in intracellular pH (pHi) via an Na(+)-H+ exchanger. ...
journal_title:Molecular reproduction and development
pub_type: 杂志文章
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journal_title:Molecular reproduction and development
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journal_title:Molecular reproduction and development
pub_type: 杂志文章
doi:10.1002/mrd.1080400216
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journal_title:Molecular reproduction and development
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journal_title:Molecular reproduction and development
pub_type: 杂志文章
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更新日期:2005-04-01 00:00:00
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pub_type: 杂志文章
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更新日期:1996-06-01 00:00:00
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pub_type: 杂志文章
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journal_title:Molecular reproduction and development
pub_type: 杂志文章
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更新日期:2014-08-01 00:00:00
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pub_type: 杂志文章
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更新日期:1990-05-01 00:00:00
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journal_title:Molecular reproduction and development
pub_type: 杂志文章,评审
doi:10.1002/mrd.21091
更新日期:2010-01-01 00:00:00
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journal_title:Molecular reproduction and development
pub_type: 杂志文章
doi:10.1002/mrd.20440
更新日期:2006-07-01 00:00:00
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pub_type: 杂志文章
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更新日期:2005-08-01 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章
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更新日期:1990-04-01 00:00:00
abstract::Cattle consuming endophyte-infected tall fescue grass have an associated reduction in circulating progesterone and reduced reproductive rates. In this study, commercially available rat microarrays were used to analyze the gene expression in luteal tissues from heifers fed endophyte-free fescue, endophyte-infected fesc...
journal_title:Molecular reproduction and development
pub_type: 杂志文章
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更新日期:2004-02-01 00:00:00
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journal_title:Molecular reproduction and development
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更新日期:2007-02-01 00:00:00
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更新日期:2015-11-01 00:00:00
abstract::Glutamine (GLN) is a metabolic precursor for hexosamine synthesis and its inclusion in culture medium has been reported to improve cumulus expansion. Glutamine and cysteine share the same transport system. Excess external GLN may act as a competitive inhibitor for the uptake of cysteine and stimulate loss of cellular ...
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