OHSU Healthcare Topic Search: Genetics and Birth Defects
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Home Page - Medical Genetics
Detailed information on medical genetics, including chromosome abnormalities, single gene defects, multifactorial inheritance, teratogens, and non-traditional inheritance
Topic Index - Medical Genetics
Detailed information on medical genetics, including chromosome abnormalities, single gene defects, multifactorial inheritance, teratogens, and non-traditional inheritance
When to Seek Genetic Counseling
A family history of certain diseases or disorders or certain factors affecting the pregnancy itself may be reasons to visit a genetic counselor.
Amniocentesis Procedure (tests & procedures)
Amniocentesis is a procedure used to obtain a small sample of the amniotic fluid that surrounds the fetus during pregnancy. The fluid is analyzed to help diagnose certain birth defects.
Prenatal Counseling
Detailed information on prenatal diagnosis to detect fetal abnormalities in the womb
Chorionic Villus Sampling (CVS) (tests & procedures)
This prenatal test involves taking a sample of tissue from the placenta to test for chromosomal abnormalities and certain other genetic problems.
Large for Gestational Age (LGA)
The average baby weighs about 7 pounds at birth. About 10 percent of all babies weigh more than 8 pounds, 13 ounces. Rarely do babies weigh over 10 pounds.
Topic Index - High-Risk Pregnancy
Detailed information on high-risk pregnancy
Types of Genetic Diseases
Genetic diseases are classified by type: chromosomal abnormalities, single gene defects, problems caused by exposure to certain substances, or a combination of these.
Factors Contributing to Congenital Heart Disease
In up to 90 percent of cases of congenital heart defect, the cause is thought to be a combination of genetics and environment.
Multifactorial Inheritance and Birth Defects
Detailed information on multifactorial inheritance, including different multifactorial traits and diseases
Small for Gestational Age
Although some babies are small because of genetics (their parents are small), most SGA babies are small because of fetal growth problems that occur during pregnancy.
