To ensure the best possible health for you and your unborn child, you receive this treatment while pregnant. Check your health and your unborn child’s health and provide helpful information to ensure a good pregnancy, such as suggestions for a healthy diet and exercise routine. Talk about your choices and options for care during pregnancy, labor, and delivery. Antenatal screening tests, such as Down’s syndrome blood tests to check for syphilis, HIV, and hepatitis B screening for sickle cell and thalassemia, are performed during two prenatal ultrasound scans at 8 to 14 weeks and 18 to 21 weeks of pregnancy.