Congrats on your pregnancy, mama! OSMAK (Operating Suite - Maternal and Child) usually means you're delivering in a hospital setting, so you'll want to bring copies of your prenatal records, valid ID, insurance cards, and a comfortable going-home outfit for baby (newborn at least, pero mas ok kung may extra sizes din). One of my mum friends who delivered sa hospital din said prepare ka na rin ng toiletries, maternity pads, comfortable clothes for after delivery, at any personal items na kailangan mo to feel comfortable during labor, actually ang dami, pero ang best advice ko is ask your OB or the hospital staff directly kung ano talaga ang specific requirements nila kasi bawat hospital may sariling system hehe, pero generally yan na ang basics!