The last few months of pregnancy — the third trimester — can be physically and emotionally challenging. Third trimester signs and symptoms might include backaches, swollen ankles and mounting anxiety.
During the third trimester, your baby will likely open his or her eyes and pack on the pounds. This rapid growth might lead to more pronounced fetal movements. At the start of week 39 your baby is considered full term.
During the third trimester, you'll continue to meet with your health care provider regularly. He or she might check the baby's position and assess cervical changes. As your due date approaches, continue to ask questions. Knowing what to expect during the third trimester can help you during the final stages of pregnancy.(From Mayo Clinic)