Paal Porutham is an additional compatibility check used in some astrology traditions during marriage matching. It compares the birth stars of the bride and groom based on their Paal Maram (milk tree) or Paal Illa Maram (non-milk tree) classification. By checking this grouping, astrologers try to understand aspects related to family growth and the blessing of children. It is usually checked as a supporting factor along with other poruthams.