Sayang, gambar scan 18 minggu memang susah nak tengok gender dengan jelas from a photo je, depends betul-betul pada angle, clarity, dan positioning baby masa scan tu! Kalau ikut my experience and my mum friends punya stories, sonographer je yang boleh confirm betul-betul masa actual scan, sebab they know exactly apa yang nak cari. At 18 weeks, kalau baby cooperate and positioning okay, boleh nampak but honestly banyak uncertainty pa, especially if ini first time tengok scan gambar. Best bet is tanya balik your sonographer, they're the experts!