1. Even before birth, fetuses can smell. One study found that 3-day-old infants could recognize the specific smell of their mom's amniotic fluid.
2. At birth, a newborn is drawn to the smell of breast milk; by 2 weeks, a baby can tell the difference between the scent of his mother's breast milk and another mom's milk.
3. A familiar odor can soothe your infant, a recent Swiss study found, so try holding her with a blanket that smells of breast milk or baby lotion during her next vaccination.
4. For the first two months, your baby prefers your scent to anyone else's. Even at your dirtiest, your baby still thinks you smell like roses.