Ultrasound has been used in obstetrics for over 50 years. Ultrasound services provided to you in the context of your pregnancy care follow the ALARA (as low as reasonably possible) principle and the recommendations of The Australian Society for Ultrasound in Medicine. This means that we will only perform an ultrasound when indicated, and minimise the exposure time and intensity. We have written more about the use of ultrasound in pregnancy in our blog .