part_of part of part of has potential to develop into has potential to develop into reproductive system gonad primordium gonad primordium ZFA:0001262 EHDAA:5927 undifferentiated gonad UBERON:0005564 WBbt:0008366 uberon EFO:0003651 future gonad Immature reproductive tissue that has not undergone final maturation into either testis or ovary.[TAO] immature gonad gonadal primordium Portion of tissue that gives rise to the immature gonad. RETIRED_EHDAA2:0002148 primitive gonad TAO:0001262 EMAPA:17204 this is a very broad grouping class