Inclusion criteria: Mothers interest to exclusive breastfeeding, mothers interest to pumping breast, have minimum 18 years old, have normal body mass index, present of mother in hospital in special room for mother and neonate, preterm infant with gestational age less than 32 weeks, Infant hospitalization in NICU fed with NG tube.
Exclusion criteria: Use of cigarette, alcohol and drugs, use of any galactogogue and complementary drug, affliction of mother to infectious transferable diseases from lactating such as HIV and active pulmonary Tuberculosis, history of infertility, diabetic mother, mother use of anticoagulation, mothers with cancer related to estrogen, mother with psychological disorder, lack of breast growth in prenatal period, performance of breast surgery, existence of some illness of mother such as mastectomy, inverted nipple, abscess, and infection mastitis, existence of congenital anomalies such as harelip and cleft palate, twin neonates.