47,XX,+21; 47,XY,+21; Trisomy 21
A disorder caused by the presence of an extra chromosome 21 and characterized by mental retardation and distinguishing physical features.
Anencephaly is a defect in the closure of the neural tube during fetal development. The neural tube is a narrow channel that folds and closes between the 3rd and 4th weeks of pregnancy to form the brain and spinal cord of the embryo. Anencephaly occurs when the "cephalic" or head end of the neural tube fails to close, resulting in the absence of a major portion of the brain, skull, and scalp. Infants with this disorder are born without a forebrain (the front part of the brain) and a cerebrum (th...
Down Syndrome as related to Anencephaly
- Down syndrome - Wikipedia, the free encyclopedia
Down syndrome (DS or DNS) or Down's syndrome, also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21.
- Termination rates after prenatal diagnosis of Down ...
Down syndrome: Caleb’s Story. There are many different emotions a mother and father go through when their child is born with a disability, but the emotion that most ...
- Down Syndrome: Get the Facts on Symptoms - MedicineNet
Read about Down syndrome facts, symptoms, tests, statistics, treatment, and more.
- Down syndrome definition - MedicineNet - Health and ...
Our Down Syndrome Main Article provides a comprehensive look at the who, what, when and how of Down Syndrome
- Older mothers: Down syndrome, trisomy 21, trisomy 18 ...
Down syndrome. Down syndrome (or Down's syndrome) was named after John Langdon Down (1828-1896), who was the first physician to identify it, in 1866.
- Screening for Down syndrome | BabyCenter
Find out what screening tests can help assess your baby's risk of Down syndrome.
- Testing for Down’s syndrome during pregnancy
The NHS Fetal Anomaly Screening Programme has produced the leaflets below aimed at parents.
- Web-Exclusive Q&A: Screenings for Down syndrome
What is Down syndrome? Down syndrome is caused by the presence of an extra chromosome number 21 in the cells of the developing baby. In an unscreened …
- Anencephaly - Genetics Home Reference - Your guide …
Anencephaly is a complex condition that is likely caused by the interaction of multiple genetic and environmental factors. Some of these factors have …