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


The Canadian Press
Environmental exposures can have an impact on whether men's 'boys ...
The Canadian Press, TORONTO - Apr 21, 2008
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Source: Google News

Men with infertility caused by AZFc deletion can produce sons by intracytoplasmic sperm injection, … -
DC Page, S Silber, LG Brown - Human Reproduction, 1999 - ESHRE
... hormone (LH) 6.0, 4.3, and 6.0 IU/l; and testosterone 413, 320 ... At present, we anticipate
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Importance of Early Postnatal Germ Cell Maturation for Fertility of Cryptorchid Males -
H Res - Logo, 2001 - content.karger.com
... postnatally under gonadotropin and testosterone stimulation are of fundamental
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Testosterone treatment in adolescent boys with constitutional delay in growth and development -
RA Richman, LR Kirsch - N Engl J Med, 1988 - Mass Med Soc
... Citation(s): Richman RA; Kirsch L R. Testosterone treatment in adolescent
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The Chance for Fertility in Adolescent Boys After Corrective Surgery for Varicocele -
F Hadziselimovic, B Herzog, P Jenny - The Journal of Urology, 1995 - Elsevier
... Levels of testosterone were comparable in both groups of ... hormone plasma levels in
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HORMONAL TREATMENT MAY HARM THE GERM CELLS IN 1 TO 3-YEAR-OLD BOYS WITH CRYPTORCHIDISM -
D CORTES, J THORUP, J VISFELDT - The Journal of Urology, 2000 - Elsevier
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Testis Histopathology in Boys With Cryptorchidism Correlates With Future Fertility Potential -
SL RUSNACK, HSIY WU, DS HUFF, HM SNYDER, MC CARR, … - The Journal of Urology, 2003 - Elsevier
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… B in boys from birth to adulthood: relationship with age, pubertal stage, FSH and testosterone -
PM Crofton, AEM Evans, NP Groome, MRH Taylor, CV … - Clinical Endocrinology, 2002 - Blackwell Synergy
... treatment in boys without growth hormone deficiency impair testicular function? ... P.
(1978) Plasma testosterone levels in men attending a sub-fertility clinic. ...

… Assessment of Hormonal and Physical Alterations during Normal Puberty in Boys. V. Rising Leptin … -
CS Mantzoros, JS Flier, AD Rogol - Journal of Clinical Endocrinology & Metabolism, 1997 - Endocrine Soc
... No relationship between DHEAS and either leptin or testosterone levels was identified
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Fertility preservation of boys undergoing anti-cancer therapy: a review of the existing situation … -
I Aslam, S Fishel, H Moore, K Dowell, S Thornton - Human Reproduction, 2000 - ESHRE
... life, following cure from cancer, infertility is an ... The onset of puberty in boys
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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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