The key to having a healthy baby is taking good care of your own health. The healthier you are, the stronger you and your baby are likely to be. That means having regular checkups throughout your pregnancy. Page Content9 to 11 weeks to 28 weeks:Monthly visit with your obstetrician.First trimester screening, a blood test to screen for chromosome problems and Down’s syndrome.16 weeks:“Tetra-Screen,” a blood test to screen for problems or abnormalities such as spina bifida and Down’s syndrome.18 weeks to 22 weeks:Ultrasound to assess fetal anatomy.25 weeks to 28 weeks:“One-hour glucose screen,” a blood test to screen for diabetes.28 weeks to 36 weeks:Visits every two weeks with your obstetrician.36 weeks to delivery:Visits at least every week with your obstetrician.Special Situations:Under some circumstances, you may need additional points of care:If your blood type is RH negative or you have certain other blood conditions, then you may need a blood test called “an indirect coombs test” at about 26 weeks.If your blood type is RH negative and your indirect coombs test is negative, then you may need a shot called Rhogam at 28 weeks.If your doctor orders specific testing, then you may need a special appointment for additional testing.Obstetric and Pelvic SonogramsIn prenatal care, sonograms are an important tool in helping to determine growth characteristics of the unborn child. Sonograms use ultrasound to visualize internal organs; they do not use radiation. For this reason, sonograms are often used for studying pregnancies and evaluating problems with the pelvic organs.Your obstetrician may perform some sonograms in the office. However, most of your sonograms will be scheduled through Kelsey-Seybold’s Radiology Department. Our registered technologists use state-of-the-art sonography equipment, and the sonograms are reviewed by Kelsey-Seybold physicians specializing in Radiology. In some cases, your sonogram will be scheduled at the same location where you visit your obstetrician.The Final WeeksAs you get closer to your due date, you will be meeting weekly with your obstetrician. In the majority of cases, the OB you choose to care for you during pregnancy will deliver your baby. If, for any reason, your OB doctor is not available for your delivery, then another qualified Kelsey-Seybold obstetrician will deliver your baby.