- Had been exposed to an immediate release formulation of exenatide (e.g. BYETTA®) or a non-insulin antidiabetic medication other than exenatide on or after the first day of the last menstrual period (insulin use will be allowed for both groups). OR participant has been exposed to an extended release formulation of exenatide (e.g. BYDUREON®) within 8 weeks of the first day of the last menstrual period