Hi! From what I know, most hospitals require a swab test (RT-PCR or antigen) done within 48-72 hours before delivery, so usually valid lang for around 3 days, pero best to check directly with your hospital kasi bawat facility may sariling protocol talaga, lalo na ngayon. A few of us moms nag-coordinate with our OB kung exactly anong requirement nila and kung pwedeng i-test kami within that window para safe ang lahat. Definitely ask your hospital din kung ano ang latest requirement nila para walang hassle on delivery day!