• Register
  • Login
  • Bookmark this page!
Skip Navigation LinksHome Page    >    Fertility and genetic    >    Turner Syndrome
 
 
Pregnancy links...
Health links...
Genetics links...
Medical links...
Autism links...
Other links...
 

Turner Syndrome

What is a chromosome disorder and what is its significance?

Chromosomes are the structures in which our hereditary material ( DNA ) is packed. A healthy person has 46 chromosomes (23 pairs). One chromosome of each pair (i.e. a total of 23 chromosomes) is donated by each parent to the fetus. Twenty-two pairs are called autosomes, and the 23rd pair consists of the sex chromosomes (X and Y). Females have two X chromosomes and males have one X and one Y. The chromosome pairs are arranged and numbered by size and shape, and each has different genes. Because there are two copies of each chromosome, there is effectively a duplicate gene system (one maternal and the other paternal), each identical in sequence to the other.

A change in the number or structure of the chromosomes in pairs 1 - 22, causing an addition or deletion of chromosomal information in these pairs compared with the normal state, constitutes a significant medical problem. In the great majority of cases, this change is expressed as severe structural or functional defects in the tissues and/or mental retardation. For example, an extra number 21 chromosome, resulting in three instead of the normal two so that there are 47 chromosomes altogether, causes Down syndrome. An extra number 18 chromosome, which is larger and therefore contains more genes, manifests as a more severe disorder called trisomy 18. In this syndrome, there are severe defects, and it usually ends in death soon after birth or even in the uterus. This is also the case with a deletion of the whole or a part, however small, of chromosome 18.

Conversely, the clinical manifestation of a change in the number of sex chromosomes (X or Y) or their structure, as is the case in Turner syndrome, is usually less severe. See under Chromosomes.

What is Turner syndrome?

This syndrome is caused by the absence of one X chromosome in females, so that these girls have only one X chromosome and a total of 45 chromosomes altogether.
This is monosomy X. Some cases occur when the monosomy is present in only some of the cells, while others cells are normal - this condition is known as mosaicism.

The syndrome is reported to have a frequency of 1:1500 to 1:2500 live female births.

There is a wide spectrum of clinical signs of varying degrees of severity, the major ones of which are short stature and ovaries that fail to develop, resulting in infertility and lack of secondary sexual characteristics in the absence of hormonal therapy.

A significant number of these girls have a characteristic build with a wide, webbed neck.

Some also have heart defects such as aortic stenosis (narrowing of the aortic valve). There is marked developmental variation. Some girls with this syndrome have normal intelligence, but some have a cognitive deficit compared to healthy siblings, and some need a supportive study framework and even possibly special education. In most cases, however, there is no significant mental retardation.

significant percentage of fetuses with this syndrome abort spontaneously in the early stages of pregnancy. In most of these cases there are accompanying defects, such as heart defects. The presence of the syndrome should be suspected if a webbed neck with a significant cystic hygroma or diffuse edema is diagnosed, or when a heart defect is detected by ultrasound examination in the first trimester of pregnancy.
Turner Syndrome

Turner Syndrome


 
Haven't found what you're looking for? Search for it here:   
Comments (29)


Thursday, February 12, 2015 10:23 AM
(1) asad  says:


como este

You should chat it’s splendid. Your blog audit would swell up your visitors. I was very pleased to find this site.I wanted to thank you for this great read!! I definitely enjoying every little bit of it and I have you bookmarked to check out new stuff you post.


Tuesday, February 17, 2015 12:07 PM
(2) jannat  says:


check out this site

Such a very useful content. Very exciting to study this content.I would like to thank you for the initiatives you had created for composing this amazing content.


Monday, March 09, 2015 10:51 PM
(3) michealjohn  says:


Matt Lloyd

I might want to thank you for the exertions you have made in composing this article. I am trusting the same best work from you later on also.


Wednesday, March 11, 2015 3:39 AM
(4) michealjohn  says:


High Frequency Trading

Good Post, I am a big believer in posting comments on sites to let the blog writers know that they’ve added something advantageous to the world wide web!


Wednesday, March 11, 2015 7:00 AM
(5) helen  says:


Wide Wallpapers

Hmm… I read writes on a comparative subject, however i never went by your online journal. I added it to top choices and i'll be your steady followers.


Wednesday, March 11, 2015 8:40 AM
(6) zeeshan  says:


Supcompare

Thanks very much for this great article;this is the stuff that keeps me going through out these day.


Thursday, March 12, 2015 4:07 AM
(7) dolly  says:


Cowboy Boots For Kids

I read this article. I think You put a lot of effort to create this article. I appreciate your work.


Saturday, March 14, 2015 5:27 AM
(8) ren  says:


Baby Crib Set

I definitely enjoying every little bit of it. It is a great website and nice share. I want to thank you. Good job! You guys do a great blog, and have some great contents. Keep up the good work.


Saturday, March 14, 2015 11:06 AM
(9) jenefer  says:


Garage doors Thornton

This article gives the light in which we can observe the reality. This is very nice one and gives indepth information. Thanks for this nice article.


Sunday, March 15, 2015 9:09 PM
(10) valcano  says:


Binary Bank Breaker

I am always searching online for articles that can help me. There is obviously a lot to know about this. I think you made some good points in Features also. Keep working, great job!


Monday, March 16, 2015 5:44 AM
(11) Pirlanta  says:


Very good

Hey, very good information thanks for this. I added this page bookmarks.


Monday, March 16, 2015 10:24 AM
(12) blogger  says:


Text Your EX Back

Indeed I show it past however I had quantity notions about it besides today I loved to comprehend it afresh being it is very well written.


Wednesday, March 25, 2015 1:51 AM
(13) jonelee123  says:


ristorante monopoli

Many entrepreneurs are thinking about putting up their own restaurants. Restaurants are generally seen as good business ventures because people are always looking for food.


Wednesday, March 25, 2015 1:54 AM
(14) jonelee123  says:


ristorante monopoli

Many entrepreneurs are thinking about putting up their own restaurants. Restaurants are generally seen as good business ventures because people are always looking for food.


Sunday, March 29, 2015 7:05 PM
(15) dewa  says:


great

I like your post. It is good to see you verbalize from the heart and clarity on this important subject can be easily observed.


Sunday, March 29, 2015 7:14 PM
(16) desa  says:


fedas

Thanks for creating the page! Im positive that it will be very popular. It has good and valuable content which is very rare these days


Tuesday, March 31, 2015 5:04 AM
(17) asad  says:


claif2013.com/zcode-el-sistema-zcode-funciona/

Thank you very much for this informative post.I really enjoyed the article.I hope that other readers will also experience how I feel after reading your article.


Thursday, April 02, 2015 4:03 AM
(18) asad  says:


Calculatoare Second Hand

I am still learning from you, but I am trying to achieve my goals. I certainly enjoy reading all that is posted on your blog. Keeps the information coming. I loved it.


Monday, June 20, 2016 11:57 PM
(19) Packers  says:


Packing and Moving Services

Packers and Movers Pune Charges # http://www.movers5th.in/packers-and-movers-pune/ Packers and Movers Mumbai Charges # http://www.movers5th.in/packers-and-movers-mumbai/ Packers and Movers Delhi Charges # http://www.movers5th.in/packers-and-movers-delhi/


Monday, June 20, 2016 11:58 PM
(20) Bhole Shankar  says:


Packing and Moving Services

Packers and Movers Bangalore Charges # http://www.movers5th.in/packers-and-movers-bangalore/ Packers and Movers Hyderabad Charges # http://www.movers5th.in/packers-and-movers-hyderabad/ Packers and Movers Gurgaon Charges # http://www.movers5th.in/packers-and-movers-gurgaon/


Monday, June 20, 2016 11:59 PM
(21) Bhole Shankar  says:


Packing and Moving Services

Packers and Movers Noida Charges @ http://www.movers5th.in/packers-and-movers-noida/ Packers and Movers Chennai Charges @ http://www.movers5th.in/packers-and-movers-chennai/ Packers and Movers Navi Mumbai Charges @ http://www.movers5th.in/packers-and-movers-navimumbai/


Tuesday, June 21, 2016 12:00 AM
(22) Bhole Shankar  says:


Packing and Moving Services

Packers and Movers Thane Charges @ http://www.movers5th.in/packers-and-movers-thane/ Packers and Movers Ghaziabad Charges @ http://www.movers5th.in/packers-and-movers-ghaziabad/ Packers and Movers Faridabad Charges @ http://www.movers5th.in/packers-and-movers-faridabad/


Tuesday, June 21, 2016 12:01 AM
(23) Bhole Shankar  says:


Packing and Moving Services

Packers and Movers in Hyderabad Charges @ http://www.moveby5th.in/packers-and-movers-hyderabad.html Packers and Movers in Pune Charges @ http://www.moveby5th.in/packers-and-movers-pune.html Packers and Movers in Bangalore Charges @ http://www.moveby5th.in/packers-and-movers-bangalore.html


Tuesday, June 21, 2016 12:04 AM
(24) Bhole Shankar  says:


Packing and Moving Services

Packers and Movers in Delhi Charges @ http://www.moveby5th.in/packers-and-movers-delhi.html Packers and Movers in Gurgaon Charges @ http://www.moveby5th.in/packers-and-movers-gurgaon.html Packers and Movers in Mumbai Charges @ http://www.moveby5th.in/packers-and-movers-mumbai.html


Wednesday, July 27, 2016 3:47 AM
(25) Venus Factor Sca  says:


weight loss tips

You have the feeling to get it right in terms of diet anything. But the fight against excess pounds was hitherto limited success. Successful experiences are non-existent, and there's a standstill. http://tinyurl.com/venusfactoreviewz


Wednesday, October 05, 2016 8:48 PM
(26) sam  says:


Nice Blog

Nice blog. Found this while searching through google


Tuesday, January 10, 2017 8:57 AM
(27) tedwed.com  says:


tedwed.com

It is indeed very helpful for me and I understand the value of this post.


Thursday, February 09, 2017 9:00 AM
(28) thejacketzone  says:


thejacketzone

Superb publish! Exceptional sharing! It is absolutely an important material and associated with the worthy study piece.


Tuesday, February 28, 2017 12:22 AM
(29) Justin  says:


hey

hey sir i like it your comment





Leave a Comment
Name
Email (will not be published)
Website (optional)
Subject
Your Comment

Line and paragraph breaks are automatic.

Please type the characters you see in the picture:


All content Copyright © 2009-2011, Genetics of Pregnancy Encyclopedia Corporation. All rights reserved.