Final answer:
It is true that expectant mothers over 35 are often advised to have amniocentesis to test for fetal genetic abnormalities, due to increased risks of disorders with maternal age. This procedure, along with genetic counseling, helps parents understand and manage potential genetic risks.
Step-by-step explanation:
It is true that physicians commonly recommend that expectant mothers over the age of 35 consider undergoing amniocentesis to test for genetic abnormalities in the fetus.
This recommendation is due to an increased risk of chromosomal disorders like trisomy 21, which the data indicates rises notably with maternal age. Amniocentesis involves drawing amniotic fluid from the mother's abdomen, allowing healthcare professionals to exam the fetal cells it contains for genetic defects.
Consulting with a genetic counselor can also provide valuable insights into the risks of genetic and chromosomal disorders based on family history, age of the mother or age of the father (over 55), and other factors.
Since amniotic fluid contains fetal cells, analyzing it can not only detect genetic disorders but also isolate non-embryonic stem cells that have the ability to differentiate into various cell types.
These insights help in not only detecting potential health issues but also in researching developmental biology. Carrier status for genetic diseases such as Fragile X or cystic fibrosis can also be determined through DNA testing, which can further guide expectant parents on their reproductive choices.