Receptor speculated to be essential for sexual development. May regulate gonadotropin-releasing hormone (GnRH) secretion. The receptor expression could be a 'stop signal' for GnRH1, GnRH2, and GnRH3 neuronal migration, leading to suppression of cell growth and modulation of GnRH secretion, which is important for normal sexual development. Expressed in a significantly high percentage (45-60%) of mature GnRH1, GnRH2, and GnRH3 neurons and in immature GnRH3 neurons, which had migrated to the vicinity of their final locations in the brain. Only 5% of immature GnRH1 and GnRH2 neurons have receptor transcripts. Belongs to the G-protein coupled receptor 1 family.