Psalms for Birth

For my sisters who are due to give birth soon:

There is a popular custom that when the wife is in active labor she or her husband should repeat psalm number 20, twelve times.

Lubavitch Chassidic custom instructs us to read the following psalms during the birth: 1, 2, 3, 4, 20, 21, 22, 23, 24, 33, 47, 72, 86, 90, 91, 92, 93, 104, 112, and 113 to the end of the book of Psalms.