For pregnant women with type 1 or type 2 diabetes with impaired renal function, emphasize the importance of maintaining blood pressure levels below 130/80 mmHg during pregnancy and offer antihypertensives known to be safe in pregnancy as indicated. Advise women to modify major risk factors for cardiovascular disease (e.g. smoking, unhealthy diet, sedentary behaviour) and to seek specialist postnatal follow-up.