Hindi siya maaga, mommy! BPS (Biophysical Profile Scan) ay usually ginagawa around 28-34 weeks, pero maraming centers ang nag-order na around 26 weeks din especially kung may reason like monitoring lang or routine check, okay lang yan at normal practice dito sa Pinas. I'd ask your OB kung bakit nag-refer ka ng center, baka may specific reason sila, pero generally safe lang yung timing na yan at walang problema.