Plays an essential role during the late stages of embryonic neurogenesis. May either fine-tune the guidance or the spatial maintenance of the migrating SNB and in nerve roots, which are composed of axons originating from distinct groups of motor neurons and may be required to either guide or maintain the position of these nerves along a direct and straight path to their ultimate targets in particular muscle fields. May play a role in egg chamber development and/or may confer essential maternal contributions to the early embryo. Ovaries and embryonic central nervous system. Major expression is seen in the ovaries while moderate levels of expression are observed during embryogenesis and throughout subsequent stages of fly development. Belongs to the NFX1 family.