High blood glucose levels during pregnancy can also increase the chance that your baby will be born too early, weigh too much, or have breathing problems or low blood glucose right after birth. High blood glucose also can increase the chance that you will have a miscarriage link or a stillborn baby. A blood sugar test during pregnancy is used for diagnosis. Treatment strategies include daily blood sugar monitoring, a healthy diet, exercise and monitoring the baby. If blood sugar is too high, medication is required. If diet and exercise aren't enough to manage your blood sugar levels, you may need insulin injections to lower your blood sugar. A small number of women with gestational diabetes need insulin to reach their blood sugar goals. Some health care providers prescribe an oral medication to manage blood sugar levels.