There would be increase in oxytocin in one's cerebrospinal fluid in the brain causing a major role in the mother's behavior. Breastfeeding would release the oxytocin from the mother's brain. It allows one's baby to get milk from the breasts causing one's uterus to return back to it's normal size after birth. It also nourishes love, nurture and bond between the mother and child.
Auxin, The substance responsible for cell elongation is auxin. This phytohormone is formed in cells at the tip of the shoot and is then passed from cell to cell.