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Tests
A potassium blood test measures the amount of potassium in your blood. Potassium is a type of electrolyte . Electrolytes are electrically charged minerals that help control the amount of fluids and the balance of acids and bases (pH balance) in your body. They also help control muscle and nerve activity and perform other important functions.
Tests
Prenatal cell-free DNA (cfDNA) screening is a blood test given during pregnancy . During pregnancy, some of the fetus's DNA circulates in the mother's bloodstream. A cfDNA screening checks this DNA to find out if the baby is more likely to have certain conditions caused by an abnormal number of chromosomes , such as Down syndrome .
Tests
A testosterone levels test measures the amount of the hormone testosterone in a sample of your blood. Hormones are chemical messengers in your bloodstream that control the actions of certain cells or organs.
