Alhamdulillah, tu memang normal je, at 19 weeks, baby's facial features including lips are still developing and haven't fully fused yet, so doctor tu betul when dia skip that part untuk sekarang. Usually by 20-24 weeks things are clearer, so likely boleh dapat better view dalam scan seterusnya nanti, jangan khawatir ye! Kalau ada other concerns atau nak confirm anything, just tanya balik doctor during your next visit, they know your case best.