Vibration effects on setting pregnant women--subjects of various masses.

An electrical simulation of a mechanical model of a 60 kg pregnant woman subjected to horizontal and vertical vibrations has been investigated by using a computer software package (MICRO-CAP II). The results have shown that mechanical vibrations affect the body segments differently based on their location, the kind of vibration and pregnancy development. The vibrations' effect on the body varies from segment to segment and a lady driver is affected by vibrations more than a lady passenger. Horizontal vibrations affect body segments (lower arm, upper arm, head, thorax, torso, cervical spine, and lumbar spine) more than vertical vibrations, while the thorax is affected by vertical vibrations, more than horizontal vibrations.