Bernard Hayes has written:

'Once there were stacks of them'

'Non-invasive cardiovascular monitoring' -- subject(s): Cardiovascular system, Diagnosis, Diseases, Electrocardiography, Noninvasive Diagnosis, Patient monitoring

'Out of Darkness'

No. It is a non-invasive method

Ultrasound pictures are a fantastic advancement in technology. One practical application of ultrasound is in the non-invasive monitoring of fetal development in pregnant women.

No. It is a non-invasive method

Invasive means that this animal or plant is invading Australia e.g it could be wrecking fences. Non invasive means its doing no harm at all e.g the cow is non invasive becaause its not doing anything wrong, its actally helping us by giving us milk!