May a blue card dependent stay out of Germany for more than six months?


My wife is a pregnant (now in 6th month) and she wants to stay in India for almost 10 months (for delivery, visa for baby too), I want to know is there any article number that allows the blue card dependent to stay abroad for more than six months?

I asked the Ausländeramt they said it is not allowed for more than six months but I read in many blogs that blue card dependents are allowed maximum of 12 months. I would like to know about an article number that existed that allows to stay abroad for more than six months.