After giving birth, as long as the baby is around, he can suck at any time. There is no need for a breast pump.
If the baby does not pump milk, or if there is less milk, you can indeed use a breast pump to maintain milk supply and chase milk.
But the sisters should tell the mother that when the baby is sucking, she can have emotional communication with her mother, which can help her to secrete prolactin faster;
The breast pump is just an auxiliary tool. Once the milk volume is balanced, it is best to stop using the breast pump and switch to pro-feeding. Let the baby suck more and the milk will come faster.
If the baby is born prematurely, is hospitalized with jaundice, or carries back milk, the breast pump must be used regularly, and it must be ensured that both sides are sucked; after returning home, change to breastfeeding.
For mothers with little milk, it is recommended to use a breast pump to empty the breasts after the baby has eaten, which will help increase milk production.