The following segulah for Zera shel Kayama (a blessing for children) is said in the name of the mekubal (kabbalist), the great and saintly rabbi, Rabbi Haim Falaji, zt”l:
One should set aside for charity 91 of the smallest whole monitary unit of one’s country. It appears this should preferrably be done with coins, such as 1-dollar coins in the U.S. or 1-shekel coins in Israel. One should then add additional coins until he has reached the count of twice of the gematria (numerical value) of the hebrew word ‘ben’ (which means son). [The numerical value of ben is 52, double the value is 104.]
This money should then be given to a needy person in your city. This is a segulah for childless couples and to bring Klal Yisrael closer to the redemption. The RBS Tzedaka Fund will distribute 104 shekel to a needy family on your behalf.