Ejaculation is the process of expelling semen from the male reproductive system through the urethra, typically occurring at the peak of sexual arousal or orgasm. During ejaculation, sperm produced in the testes mix with seminal fluid from the seminal vesicles and prostate gland to form semen. This process plays a critical role in reproduction, as the expelled semen can fertilize an egg if it comes into contact with a female reproductive system.


