At IGO we offer non-invasive prenatal testing to all pregnant women. All women are offered the state of California’s non-invasive screen for chromosomal abnormalities such as Down syndrome. This screen typically consists of a blood test done between 10 and 13 weeks of pregnancy and an ultrasound performed between 11 and 13 weeks of pregnancy. Women who will be age 35 or older at the time of delivery and women who have a history of chromosomal conditions in their family are offered additional highly sensitive testing to detect fetal DNA in the mom’s bloodstream. IGO physicians offer all patients an ultrasound between 18 and 21 weeks of pregnancy to evaluate the anatomy of the fetus.