The United States Preventive Services Task Force (USPSTF) strongly recommends universal screening of all pregnant women, while the World Health Organization (WHO) recommends all women be tested at their first antenatal visit and again in the third trimester.
United States Preventive Services Task Force (USPSTF) anbefaler kraftigt universel screening af alle gravide kvinder, mens WHO anbefaler, at alle kvinder testes ved deres første jordmoderbesøg og igen i tredje trimester.