Table 1

Recommended routine and optional prenatal tests

Gestational age
First trimester8–20 weeks24–28 weeks32–36 weeks
Routine testsBlood type and antibody screenNoneScreening for gestational diabetesGroup B strep testing
Haemoglobin or haematocritHaemoglobin or haematocrit
Urine culture
Rubella immunity
Syphilis screen
Chlamydia screen
Hepatitis B surface antigen
HIV testing
Optional testsScreening for trisomies 21, 18Ultrasound for fetal morphological assessment
Screening for cystic fibrosisScreening for trisomies 21, 18 and spina bifida
Pap smear