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A lumbar spine MRI is a painless test that uses a magnetic field and radio waves to produce detailed pictures of the bones, disks, and other structures in the lower back.
In amniocentesis, doctors take a sample of the amniotic fluid that surrounds a baby to check for signs of problems such as chromosomal disorders, genetic problems, and neural tube defects
A chorionic villus sampling (CVS) checks cells from the placenta for chromosomal abnormalities. Most women whose pregnancies are not high-risk don't need this test.
The first trimester screening (or first trimester screen) includes a blood test and an ultrasound exam. It's done to see if a fetus is at risk for a chromosomal abnormality or birth defect.
