-Breast functions: -The development and maturation of the mammary glands are in preparation for breastfeeding activities. -Breastfeeding is the most basic physiological function of the breast. The second most important function is the secondary sexual characteristics and participation in sexual activities. -For the infant: -Enriching nutrition -Improving immunity -Enhancing communication between mother and infant and enhancing the relationship -Enhancing the effect of family education during the growth of the child and building a harmonious society. -On the mother’s side: -Complete functioning of the breast -Reduces breast enlargement and reduces the chance of breast cancer -Improves the mother’s responsibility -Enables control and guidance of the child’s growth process The tasks of a lactation (lactation) instructor: – Active scientific promotion of scientific knowledge of the breast to accomplish the task of breastfeeding for the public – Assessment of the prepared mother’s breast before pregnancy – Assessment, guidance and adjustment of the mother-to-be’s breast development and nipple condition during pregnancy, in order to To assess, guide and adjust breast development and nipple condition during pregnancy in order to maximize breastfeeding success – To maintain breasts before delivery, including nipple maintenance – To provide warm breast care after birth to prevent problems from being dealt with later – To promote lactation for those with low milk supply – To facilitate lactation for those with impaired milk output.