Mak oii, biasanya kita pergi scan first trimester around 8-12 weeks untuk confirm pregnancy and check heartbeat, then anatomy scan around 18-20 weeks, pastu ada glucose test scan lagi around 24-28 weeks, tapi depend la on your clinic and doctor's recommendation, setiap tempat beza sikit! A few of my mum friends always suggest go pagi-pagi sebelum bladder full sangat (untuk transvaginal scan kena bladder penuh tapi jangan sampai uncomfortable), pastu wear comfy clothes yang boleh lift up easy, bawa kad maternity and insurance kalau ada, and best kalau ada hubby or someone come along so boleh tengok baby sama-sama, makes it lebih special! Some of us also prepare a few questions sebab sometimes scanner habis time macam tu je, muka blur-blur haha. Good luck with your scans, mama!