 [ 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 soon as you can be 100 sure of gender is when they are born before that you do have to rely on the skill and experience of the ultrasound technician six weeks is a little early to offer a definitive answer we used to affectionately call this weiner hunting so be patient your baby will either be a boy or a girl there is nothing you can do to change it now as a mother of 4 with my 5th on the way please know that you have to be patient typical ob is will order an ultrasound at about 15 20 weeks truly other than a heart beat and some newly formed limbs an ultrasound at 6 weeks does not give you to much info other than if the baby is developing normally and accurately determining a due date