. Pregnancy ultrasound. Sonographer pointing out parts of a expectant mother's foetus to her on an ultrasound scan. The sonographer is holding a transducer to scan the woman's abdomen. The transducer emits high- frequency sound waves and detects the reflected echoes. The results are used to build an image of the developing foetus in the womb, which is displayed on a monitor. This is a safe, non- invasive procedure used routinely to assess the growth and health of the developing foetus. MODEL RELEASED