A gene on chromosome 19p13.3 that encodes a transmembrane G protein-coupled receptor. RXFP2 is a receptor for relaxin and possibly also for insulin-like 3 (Leydig cell) factor.
Only a few of these infants have been shown to have INSL-3 or RXFP2 gene mutations; in the rare newborns with complete androgen insensitivity due to absence of a functional androgen receptor, the testes remain in the inguinal or groin area (Bay et al.
Mutations in INSL3 and RXFP2 genes in cryptorchid boys.