Adequate rest gives you physical and mental relaxation which is good both for you and the baby

• Have 8 hours of sleep at night and at least 2 hours rest during the day.
•  Lie on your left side as it increases the blood supply to the foetus.
• Avoid hard work such as lifting heavy weight.
• Do not overexert yourself and delegate few tasks to others.

Ref- – http://nhm.gov.in/images/pdf/programmes/maternal-health/guidelines/my_safe_motherhood_booklet_english.pdf