Pregnant teenage heroin addict remanded

A pregnant teenage heroin addict was remanded in the Invercargill district court in order for CYF to arrange treatment for her and her unborn child. The story focuses on whether or not newborns of addicts are harmed by their mother's drug use, which is a bit laughable given the very strong possibility that if she uses heroin she also smokes and drinks (probably courtesy of a sickness benefit). But I am more interested in the fact she is in court. Had she committed some other crime? Or does CYF have the power to take her to court because of concerns over the unborn child?