No, mommy. CAS (Congenital Anomaly Scan) is usually done within 18-24 weeks of pregnancy. It's a detailed pelvic ultrasound that can determine if the baby in the womb has a birth defects, aside from that makikita din ang gender ni baby. While yung BPS (Biophysical Profile Scoring) is pag kabuwanan na (37 weeks and up). Pelvic ultrasound din. Tinintingnan naman dito yung amniotic fluid, fetal heart rate, fetal tone and kung adequate pa ba ang oxygen ni baby sa loob.