It is common to have sugar in your urine (glycosuria) in pregnancy because the kidney lets more sugar escape through from the blood into your urine: this is normal. This adjustment takes place in the second trimester but it may be that it occurs again; it is likely to happen after a big meal or sweet drink. Your urine will be checked at each antenatal visit as it may warrant a blood test if it does not settle, but it is only rarely that sugar in your usine signals diabetes.