English Content More About the Author Health A-Z, Medical Tests A-Z Gamma-Glutamyl Transpeptidase (GGT) Test The gamma-glutamyl transpeptidase (GGT) test measures the amount of the enzyme GGT in your blood Read More Health A-Z, Medical Tests A-Z Fetal Ultrasound Fetal ultrasound is a test used during pregnancy. It creates an image of the baby in the mother's womb - a safe way to check the health of an unborn baby. Read More Health A-Z, Medical Tests A-Z Exhaled Nitric Oxide Test An exhaled nitric oxide level test can help diagnose and manage asthma. It measures the amount of nitric oxide that is exhaled from a breath. Read More Health A-Z, Medical Tests A-Z Double Marker Test The double marker test helps you to find if your child has any chromosomal abnormalities which might have initiated after the conception of the child. Read More Health A-Z, Medical Tests A-Z Dengue Fever Testing Dengue fever testing is used to determine whether a person with signs and symptoms and recent potential exposure has been infected with the dengue virus. Read More Health A-Z, Medical Tests A-Z Blood Typing Blood typing is a test that determines a person’s blood type. The test is essential if you need a blood transfusion or are planning to donate blood Read More Loading... more Want to live your best life? Get the Hello Doktor Daily newsletter for health tips, wellness updates and more.