GDM ON INSULIN - 35 WEEKS

hi semua... Kalau GDM on insulin, 38 weeks dah kena bersalin kn? Sape ade experience selalunya doktor akn sruh admit ward sehari sebelom 38 weeks atau tepat 38 weeks? Sbb manager dah tanye. Jumpe doktor hospital lagi 2 mggu... Tak tau camne nak jawab ke die.. ??