“One needs to pump if they are separated from their baby or if baby is not latching,” says Leigh Anne O’Connor, IBCLC, LCCE. She continues, “A person will want to pump if their baby gets a bottle as this keeps the body in balance with baby’s needs and avoids clogged milk ducts which can lead to low milk supply.” Based on your personal supply or preferences, you may choose to pump regularly, or only occasionally. If you choose to exclusively pump, and have a newborn, aim to pump every few hours, up to 12 times a day.  As your baby grows older, expect them to need a larger supply and more spaced out pumping sessions. When baby reaches six months old, they will need between 36 and 48 ounces per day.