Salam sis! I haven't given birth at HSI specifically, but a few of my mum friends who delivered in JB private hospitals usually kena bawa basic stuff je, baby diapers (confirm yes, they ask for newborn and size 1), baby clothes (few sets boleh), towels, toiletries for yourself, and your hospital file/documents la. Best kalau you call HSI labour ward directly to confirm exactly what they provide vs kena bawa, sebab setiap hospital sedikit beza. One of my friends said better confirm pasal sterilized baby bottles and formula milk juga, some hospitals boleh provide, some you kena standby, so memang better tanya dulu than rush last minute! All the best for your delivery, mama!