I guess doctor's reason to induce is due to baby's size is on bigger range. Givinf birth to a big size baby normally will end up with c-section especially if your friend's wife birth canal is small.
Induction labor does have its own risk in ending up with a c-section as cervix is still not ready to dilate to give birth.
I suggest your friend to discuss further with their gynae on weighing the pros and cons of having an induction birth earlier. I do have a friend who induced at week 36 due to large baby size and successfully gave birth to a healthy baby via vaginal birth.
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