30 - 40 minutes
Empty bladder/had full meal less than one hour
Requirement of Procedure:
28 weeks and above
32 weeks and above for most at-risk patients. However, in pregnancies with multiple or particularly worrisome high-risk conditions (e.g., chronic hypertension with suspected fatal growth restriction), testing might begin at a gestational age when delivery would be considered for perinatal benefit.
Congenital anomaly scan is not done above 26-28 weeks
*11 - 14 weeks for Screening for Hypertension in pregnancy * 18 week and above for high-risk pregnancies
*11 - 14 weeks for Nuchal Translucency