Your uterus is returning to its pre-pregnant size.
While you are breastfeeding, your body get used to making milk.
You are losing the extra fluid your body produced while you were pregnant.
Your hormone levels are returning to pre-pregnancy levels.
You are recovering from the physical effort of giving birth. If you have had a cesarean, you must also recover from surgery.
If you have had stitches, they have to heal.
