Expressed in testis (at protein level). Detected between 13.5 and 14.5 dpc in both female and male gonads (at protein level). Increases in the male gonads and intensely expressed before birth (at protein level). In female gonads, remains constant until birth (at protein level). In testis, specifically expressed in premeiotic germ cells (at protein level). In fetal ovary, expressed in both premeiotic germ cells, and germ cells that have gone through the pachytene phase and entered meiotic arrest (at protein level).