The expectant mother experiences increases in trunk dimensions and associated difficulties in performing movements. Strenuous physical work, lifting objects, and bending forward all become hard to do, and standing for long periods becomes almost impossible. Furthermore, fatigue is often present, and it may be difficult to maintain attention over extended periods. Most of these problems are especially pronounced during the second and third trimesters. Fortunately, sufficient reliable information is available in the literature to help establish recommendations for the ergonomic design of tasks and equipment suitable for pregnant women.