By 20 weeks of pregnancy, barring any complications, you’ve likely already had most recommended tests and screenings, including ultrasounds and genetic tests. As always, your practitioner will likely have you provide a urine sample at every visit. Between weeks 24 to 28, you can expect a glucose screening, where you’ll drink a very sugary beverage and your blood will be drawn to check for signs of gestational diabetes. Otherwise, depending on your pregnancy and specific risk factors, your practitioner may or may not schedule additional screenings between now and the end of your pregnancy, including ultrasounds and blood tests.