Diabetes in pregnancy and major new advances in diabetes care using long-acting and ultralong-acting insulins.

Pregestational diabetes complicates 1% to 2% of all pregnancies. Achievement of euglycemia prevents adverse maternal, fetal, and neonatal outcomes. Insulin is the first line and the backbone of diabetes treatment in and out of pregnancy, but the delicate balance between stringent control and hypoglycemia, along with the complexity and interruption of multiple injections per day, continues to make glycemic control challenging. The ideal basal insulin has a flat pharmacodynamic profile with minimal variability and is relatively easy for patients and clinicians to use. Insulin analogs, such as insulins glargine and detemir, are the most common basal insulins used in pregnancy at this time, but insulin degludec, which has advantages like prolonged duration of action in the nonpregnant population, was recently shown to be equally as effective as detemir in pregnancy. The ease of a once-daily injection without an increased risk of hypoglycemia is attractive to patients and clinicians who wish to simplify insulin regimens. Furthermore, there are current clinical trials evaluating once-weekly basal insulin regimens in the general population. This would decrease basal injections from a minimum of 365 per year to 52 per year, potentially increasing adherence and improving glycemic control. This review will discuss the evidence for insulin degludec in pregnancy as well as discuss the potential benefits and drawbacks of once-weekly ultralong-acting basal insulins in pregnancy.