Pregnancy screening tests help keep the pregnant mother and baby healthy during pregnancy. They include early pregnancy scan and blood tests to assess the normal health of the mother like RBC, Haemoglobin, Thyroid levels etc. Early pregnancy Ultrasound scan is performed usually if you have a history of miscarriage, fertility treatment or had pain or bleeding at 6-10 weeks of pregnancy assess the fetal heart rate and detects abnormalities like if your pregnancy is an ectopic pregnancy or outside