👉 In science, an ejaculation is a physical act in which semen is expelled from the reproductive tract during sexual intercourse. Ejaculation refers to the process of releasing semen into the vagina. This action can be performed by males or females and usually occurs at the end of sexual intercourse. It is important to note that while ejaculation is a normal part of male and female sexual activity, it is not always safe for individuals with certain medical conditions or those who are sexually active in their reproductive years.