<unk>  is the medical condition of a man whose semen contains no sperm. It is associated with male infertility, but many forms are amenable to medical treatment. In humans,<unk>  affects about 1% of the male population and may be seen in up to 20% of male infertility situations in Canada. In a non-pathological context,<unk>  is also the intended result of a successful vasectomy.
Azoospermia
Hypospermia
Oligospermia
Asthenozoospermia
Hematospermia
Globozoospermia
Teratospermia
Spermatorrhea