Unsaturated fats aid the action of prostaglandins as important cell regulators during the birth process. They are essential in initiating the process and in maintaining strong contractions which will expedite the birth. Low insulin levels and saturated man made fats both have the effect of inhibiting the working of prostaglandins. Diabetic mothers should eat plenty of foods containing unsaturated fats corn oil, primrose oil, milk, liver and kidney and avoid those containing man made fats, including margarines. (Unsaturated fat also helps the baby's brain to grow.) Odent also advises supplementing the diet with zinc, vitamin C, vitamin B and magnesium.

Fiona Bawdon, formerly of Balance, the BDA's magazine, is a WDDTY contributing editor.