O68: Labour and delivery complicated by fetal stress [distress]

O68.8: Labour and delivery complicated by other evidence of fetal stress

These types of signs can result, for example, if the child's heart tones are checked or an ultrasound examination is carried out. An ultrasound examination involves sending ultrasound waves from an ultrasound probe in the body. Depending on the structure of the tissue, different numbers of ultrasound waves are reflected. These waves are then converted to images that can be viewed on a screen.