If you are the mother, when you FIRST RETURN to US after child birth, you must bring the baby with you so the baby will entered as an LPR.
需要注意什莫问题吗 one question is your EB basis, because the baby (AND YOU who carry the baby) need to do secondary inspection, the employment question may come up. If you were just an ordinary GC holder passing the immigration and customs, you won't need secondary inspection so that the EB sponsor question would not have come up. But your baby needs to get LPR at secondary inspection so it is legitimate for CBP to examine you GC basis and why you don't work in US since your GC approval.
需要注意什莫问题吗 one question is your EB basis, because the baby (AND YOU who carry the baby) need to do secondary inspection, the employment question may come up. If you were just an ordinary GC holder passing the immigration and customs, you won't need secondary inspection so that the EB sponsor question would not have come up. But your baby needs to get LPR at secondary inspection so it is legitimate for CBP to examine you GC basis and why you don't work in US since your GC approval.