Sayang, soalan ni penting untuk kesihatan baby, kena tanya doctor kamu je! Amniocentesis (ambil sampel air ketuban) bukan routine untuk semua orang, biasanya doctor saja yang decide based on your scan results and risk factors. Since baby kecil, confirm dulu dengan doc or datang clinic untuk detailed scan and discussion. A few of my mum friends went through this juga, but each case different, ada yang perlu, ada yang cukup monitor je with regular scans. Don't worry too much yet, banyak babies yang small at first tapi catch up fine! Jangan delay though, book appointment with your doc ASAP to get proper assessment and peace of mind, okay?
Please talk to your doctor or OB-GYN asap, jangan delay, especially since you're concerned baby seems small. They'll do the right scans and tests for you, bukan based on internet advice. Amniocentesis (air ketuban sample) is a medical decision only your doctor can make after checking baby properly, ada risks and benefits, so kena discuss with them directly based on your full situation. Every pregnancy is different, and they'll know what's best for you and baby.