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Recent News and Articles on the Keywords: fertility + method + linked  Related to the article below (Last Update: 8/5/2008)


Washington Times
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Source: Google News

Assessing the role of HLA-linked and unlinked determinants of disease -
N Risch - Am J Hum Genet, 1987 - pubmedcentral.nih.gov
... HLA-linked and unlinked determinants of multiple sclerosis. Immunogenetics. ... [PubMed];
Risch N. The effects of reduced fertility, method of ascertainment, and a ...

Identification of RAPD markers linked to a fertility restorer gene for theOgura radish cytoplasmic … -
R Delourme, A Bouchereau, N Hubert, M Renard, BS … - TAG Theoretical and Applied Genetics, 1994 - Springer
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N-linked glycan of a sperm CD52 glycoform associated with human infertility -
AB DIEKMAN, EJ NORTON, KL KLOTZ, V WESTBROOK, H … - The FASEB Journal, 1999 - FASEB
... immunochemical studies revealed N-linked carbohydrate epitopes ... surface glycoproteins
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… of three affected-sib-pair scoring methods to detect HLA-linked disease susceptibility genes -
BK Suarez, P Van Eerdewegh - Am J Med Genet, 1984 - doi.wiley.com
... for affective disorder [Suarez and Croughan, 19821, gave evi- dence for the presence
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Genetic analysis of rice CMS-WA fertility restoration based on QTL mapping -
XL Tan, A Vanavichit, S Amornsilpa, S Trangoonrung - TAG Theoretical and Applied Genetics, 1998 - Springer
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… Sperm Parameters in Humans Are Indicative of an Abortive Apoptotic Mechanism Linked to the Fas- … -
D Sakkas, E Mariethoz, JC St. John - Experimental Cell Research, 1999 - Elsevier
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… studies of self-fertility in rye (Secale cereale L.). 2. The search for isozyme marker genes linked -
FT Fuong, AV Voylokov, VG Smirnov - TAG Theoretical and Applied Genetics, 1993 - Springer
... the same method it has been estimated that line 4 has a self-fertility allele of
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Data linkage methods used in maternally-linked birth and infant death surveillance data sets from … -
A Herman, B McCarthy, J Bakewell, R Ward, B … - Paediatric and Perinatal Epidemiology, 1997 - Blackwell Synergy
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Growth responses of several plant species to mycorrhizae in a soil of moderate P-fertility -
C Plenchette, JA Fortin, V Furlan - Plant and Soil, 1983 - Springer
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Identification of AFLP markers linked to fertility restorer genes for tournefortii cytoplasmic male- … -
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Source: Google Scholar

Fertility method linked to low testosterone in boys

Last Updated: 2007-07-31 16:35:55 -0400 (Reuters Health)

NEW YORK (Reuters Health) - Levels of the male sex hormone testosterone in infant boys who are conceived using an assisted fertility technique called intracytoplasmic sperm injection (ICSI) are significantly lower than in their naturally conceived counterparts, according to Danish researchers.

ICSI is the main method used to overcome male infertility. With ICSI, a single sperm is injected directly into a single egg. If successful fertilization occurs, the embryo is then placed into the female to undergo development as usual.

There has been concern for the health of children conceived by assisted reproduction technologies, Dr. Anders Juul and colleagues at Copenhagen University Hospital note in their study, published in the Journal of Clinical Endocrinology and Metabolism.

The researchers investigated whether the impaired testicular function of the father might be inherited by boys conceived by ICSI.

The study involved 125 boys conceived by ICSI, 120 conceived by in vitro fertilization, sometimes called "test tube" fertilization, and 933 naturally conceived boys. Standard growth measurements were taken at birth and at 3 months, and blood samples were also taken from more than half of the infants at 3 months.

The team found that testosterone levels in the blood were reduced in boys conceived by ICSI compared with the naturally conceived boys. Boys conceived by in vitro fertilization, which is performed because of female infertility, also had normal testosterone levels.

Juul and colleagues believe that these findings suggest an inherited impairment of testosterone-producing cells in ICSI-conceived boys.

The possible repercussions of these findings still need to be investigated, the investigators conclude. However, they point out that the findings are of concern "because ICSI is increasingly used to overcome male infertility."

SOURCE: Journal of Clinical Endocrinology and Metabolism, July 2007.

Copyright © 2007 Reuters Limited. All rights reserved. Republication or redistribution of Reuters content, including by framing or similar means, is expressly prohibited without the prior written consent of Reuters. Reuters shall not be liable for any errors or delays in the content, or for any actions taken in reliance thereon. Reuters and the Reuters sphere logo are registered trademarks and trademarks of the Reuters group of companies around the world.

 
 
 
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