The body working overtime to support a pregnancy might cause tiredness — and resting during the workday can be tough. It might help to:

Eat foods rich in iron and protein. Fatigue can be a symptom of iron deficiency anemia but adjusting your diet can help. Choose foods such as lean red meat, poultry, seafood, leafy green vegetables, iron-fortified whole-grain cereal and beans.
Take short, frequent breaks. Getting up and moving around for a few minutes can be helpful. Spending a few minutes with lights off, eyes shut and feet up also might help.
Drink plenty of fluids. Keep a water bottle nearby and sip throughout the day. Drink earlier in the day rather than near bedtime to cut down on trips to the bathroom interrupting sleep.
Cut back on activities. Scaling back on nonwork activities might create more time to rest after work. Consider shopping online or hiring someone to clean your house or take care of the yard.
Keep up a fitness routine. Physical activity can help boost energy levels — especially for those who sit at a desk all day. Take a walk after work or join a prenatal fitness class, as long as your health care provider says it's OK.
Go to bed early. Aim for at least eight hours of sleep every night. Resting on the left or right side will keep blood flowing well to the baby and ease swelling. For added comfort, place pillows between the legs and under the belly.