Chorionic villus sampling (CVS) is a prenatal test that is used to detect genetic disorders in the baby, usually performed between 10 and 12 weeks of pregnancy.
Ultrasound is a diagnostic imaging technique that uses high-frequency sound waves to create images of the inside of the body. It is also called sonography.
A contraction stress test is done to check how well the fetus is coping with contractions of childbirth. It's usually done in the third trimester of pregnancy.
Carrier screening is a process that allows you to find out if you are a carrier of certain genetic conditions that are caused by mutations or changes in genes.
Amniocentesis is a prenatal test used to detect genetic abnormalities in a developing baby by withdrawing a small amount of amniotic fluid from mother's womb.