The health and development of a fetus depend largely on the behavior, nutrition, and attitude of the pregnant mother. Medical studies highlight the profound impact a pregnant woman's environment has on the baby, and how tranquility and avoiding anxiety are beneficial for the fetus.
The physical development of the fetus reflects its spiritual counterpart. The mother's spiritual choices have lifelong effects on the developing new life.
Pregnancy is an auspicious time for a woman to deepen her observance of Torah and mitzvot and to refine her spirit. It is customary for her to increase her tzedakah (charity) and for the expectant father to open the Torah ark during the last month of pregnancy. Special care must be taken with the kosher diet, as the fetus is nourished by the same foods as the mother.
It is customary to recite psalms and place a copy of Psalm 121 near the bed where the birth will take place and in the baby's crib. This is considered a good omen for protection and an easy delivery.