Magnesium is truly versatile. This mineral is involved in almost all body functions: it regulates more than three hundred enzymes and participates in muscle contraction. So it is not surprising that about one third of the body's own magnesium is in the muscles. Magnesium supports the muscles by ensuring that the muscle fibres are tightened and relaxed.
In general, the need for magnesium during pregnancy is not much greater than before. However, because of its versatile functions, it is important to ensure that the body is always supplied with enough magnesium