Results and discussiont: Medium uterine height by day postpartum maternal breastfeeding early: immediately after birth was 13.13 ± 0.43 cm, after laying the first 2 hours was 14.07 ± 1.04 cm, postpartum is 12.07 ± 0.9 cm 24h, 48h postpartum is 10.47 ± 1.12 cm.