prosper,
That's strange that ur EDD is only 39 weeks. Is it 39wks and 7 d? cos for pregnancy, we only calculate 1 day after the day have passed. i.e. wk 20 only after 20 weeks have passed since our LMP.
Medically, overdue occurs when bb is still not out by wk 42. But so far in Sg, the gynaes usually induce by wk 41, or even earlier if the bb is deemed too big.
If first pregnancy, try not to get induced. When reach wk35, try walking more, climb more stairs, have sex, squatting exercises... etc for natural induction of labor. My gynae advised me to do all these once my hubby touch down in SG cos his trip in SG is limited, cant afford for bb to be overdue. She say she would induce me if i want to at wk40, if bb still no sign of wanting to come out but ask me to try all the natural methods of induction first.