Sayang, dark patches or discoloration on the placenta during scan is something yang kena check properly dengan doctor, tak boleh buat assumption sendiri! Please make sure you bring this up at your next checkup or call your OB-GYN straight away to ask what the radiologist noted, okay? Better safe than sorry during pregnancy. A few of my mum friends had various placenta findings, and honestly setiap case lain-lain, that's why doctor's explanation is so penting! Take care, and do get that clarified as soon as you can