Biologically, semen is fluid discharged from the penis typically at the time of orgasm. Semen is whitish and slightly viscous. The most important component of semen is sperm, the male cellular contribution to reproduction. The sperm cell, with...

In the male, semen is the fluid expelled during ejaculation. In addition to plasma, the semen ejaculate contains secretions from the seminal vesicles and other glands to support and nourish the living sperm cells (spermatozoa) contained within the...

Sperm cells plus the seminal fluid. Complex mixture of organic and inorganic substances produced in the postpubertal male genital tract. The term semen is applied to the fluid that is...

The impregnating fluid of male...

Semen is an organic fluid (also known as seminal fluid) that usually contains spermatozoa. It is secreted by the gonads (sexual glands) and other sexual organs of male or hermaphroditic animals for fertilization of female ova. The process of discharge...

Why is it that sperm prefer Toulouse to Paris and Helsinki to Edinburgh? With women, of course, it's the other way around. Which is not so surprising, since most of the time what is good for sperm is bad for women. This week...

Q. I have an embarrassing problem that's got me a little worried. A couple of times in the last few months, I've noticed blood in my semen. I don't have any other symptoms, so I don't think it's an infection. What else could it...