Sudden dizziness and unsteady standing in pregnant women may be related to low blood pressure, hypoglycaemia, anaemia and inadequate blood supply to the brain. If you have a poor appetite and have eaten too little, coupled with prolonged activity, you may experience hypoglycaemia, which may improve with proper food. It is recommended that a visit to the obstetrics department is made to identify any associated disorders by taking blood tests. The cause should be actively treated once the cause is identified, and care should be taken to avoid falls in daily activities so as not to affect the normal growth of the foetus.