Haha, honestly kan at 18 weeks the genitals still super kecil, so even kalau nampak terjuntai pun tak boleh 100% confirm lah. A few of my mum friends dapat "boy" confirmation at 18 weeks, tapi ada jugak yang kena surprise at the birth! Kalau doc nampak clearly ada penis then boleh lah lebih confident, but if dia cakap just based on a small protrusion, I'd say ambil je dengan grain of salt and confirm again at 20+ weeks scan, that's when it's much clearer. Most accuracy biasanya 20 weeks onwards, so jangan set expectations tinggi sangat until then okay!