 [ Symptoms ] how early can you tell gender  using a 3d ultrasound how early can you tell the gender of your baby can you tell at 6 weeks along [ Disease ] as much as i would like to help you in this matter i would need to physically see the ct scan in order to comment i know you are worried and concerned since spots on the lungs could mean something bad spots can also just indicate calcium deposits or other normal findings too so do not think of worse case scenerios until his medical provider gets back to you the subsequent chest ct scan will give much more information