Newer modalities of diagnosis in pregnancy
Answers
Answer:
A diagnostic test is used to confirm a chromosomal condition, such as Down syndrome, or a genetic condition in the baby.
You may choose to have a diagnostic test if you have:
had a previous pregnancy with Down syndrome or other birth defect
been identified as at increased risk of having a baby with a genetic condition after a first or second trimester screening test
a family history of a genetic condition.
Types of diagnostic tests
Diagnostic tests used during pregnancy can be invasive or non-invasive and include:
chorionic villus sampling
amniocentesis
ultrasound.
Invasive diagnostic tests
Both chorionic villus sampling and amniocentesis are very invasive and can increase the risk of pregnancy loss (miscarriage). The risk of pregnancy loss for both procedures, however, is less than 1 in 100 (less than 1 per cent). For this reason diagnostic tests are not routinely offered to all women but rather to those whose screening tests have identified an increased risk of Down syndrome
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