Maturation of sperm in epididymis

The sperm after its formation in the seminiferous tubules pass into the epididymis, they remain for 18-24 hours and become capable of motility, although in the epididymal fluid there are inhibitory

proteins which prevent sperm motility until ejaculation, after ejaculation the sperm become motile and capable of fertilization of the ovum, this process called maturation, from sertoli and epididymis there is a fluid ejaculated with the sperms contains estrogen and testosterone, this is essential for maturation, the adult testis form about 120 million sperms per day sperms, small quantity of them stored in the epididymis, while large quantities stored in vas deferens.