Testicular descent is controlled in pa by
Insulin like factor 3(INL 3)
RANKL
FSH
LH
Testicular descent through the inguinal canal is controlled in pa by Leydig cell production of insulin-like factor 3 (INSL3), which acts a receptor termed GREAT ( G protein-coupled receptor affecting testis descent). Ref Harrison 20th edi page no 2769
Endocrinology