CAS

Hi mommies. I had my ultrasound to know the gender of my baby when my tummy was 25 weeks. Right now, my tummy is turning 28 weeks. Is it still possible to have my congenital anomaly scan 28 weeks upwards? I haven't consulted my OB for this yet. I am planning to inform my OB during my next prenatal visit but my tummy will be 30 weeks or so at that time. Thank you for your answers.