A TSH level of 8.3 is higher than what's usually considered normal at this stage of pregnancy. Thyroid hormones are really important for your baby's brain and physical development, so keeping your levels in a healthy range matters a lot. Many moms with high TSH are put on medication and go on to have healthy babies—the key is to follow your doctor's advice closely and get checked regularly. You're not alone in this and your doctor can help bring your numbers down and keep your pregnancy on track.