Avoiding Excessive Weight Gain During PregnancyWhile it’s natural and healthy for women to gain weight during pregnancy, excess weight gain can actually be harmful for both mum and baby. Too much weight gain can cause diabetes, varicose veins and high blood pressure for expecting mums, and can also be distressing for baby. On the other hand, doctors generally don’t recommend dieting while pregnant either. The safest thing for expectant mums to do is simply avoid gaining too much weight in the first place, so here are some tips.