As your body works hard to nourish your baby, you may find yourself feeling dizzy from time to time. It's common to feel dizzy when you stand up suddenly; this is because, although your blood supply has increased during pregnancy, getting up quickly causes the blood to rush into your legs. This reduces the supply of blood to your brain, making you feel light-headed.
Dizziness can also be a symptom of anemia. Although you produce more red blood cells in pregnancy than before, your volume of blood also increases. This means that proportionally there are fewer red blood cells and your blood count will drop. You may also become short of iron and, if this is the case, you will be prescribed iron supplements. In addition to dizziness, symptoms of anemia include fatigue and shortness of breath. Low blood-sugar levels (see Get carb loading) can also cause dizziness and can be prevented by eating snacks regularly.
If you're feeling dizzy, although it's likely to be due to the physiological changes in pregnancy, inform your doctor so you can be examined and any relevant blood tests taken. If you feel dizzy when you're out and about, or if you need a seat on a bus or train, always tell someone-the majority of people will be understanding.