Receptor for relaxin. The activity of this receptor is mediated by G proteins leading to stimulation of adenylate cyclase and an increase of cAMP. May also be a receptor for Leydig insulin-like peptide (INSL3) (By similarity). Expressed in embryonic and adult gonads of males and females, as well in male gubernarculum. Expressed also in brain. Not detected in kidney, spleen and heart. Defects in Rxfp2 seems to be a cause of impaired testicular descent (known as cryptorchidism). Belongs to the G-protein coupled receptor 1 family. By homology with the human sequence, it is uncertain whether Met-1 is the initiator.