Gestational DM in case of OHA controlled sugar levels

Nullipara with inability to conceive, consults a doctor with knowledge of helping for a child and reported to get sugars controlled, with only report of HbA1 C. IGT was diagnosed, she was put on OHAS, now she's referred back for sugar control. I would be happy with insulin, any suggestions from my endo and gynecologist teachers.Doc Insights @@Dr Sepuri sir n madam and all my gynaecologist colleagues in Investigations Fbs, Plbs, HbA1C, urine Management am awaiting reports