Editing Spermatozoon (section)

==Spermatozoa production in mammals==
{{Unreferenced section|date=August 2022}}
{{Main|Spermatogenesis}}
Spermatozoa are produced in the [[seminiferous tubule]]s of the [[testicle]]s in a process called [[spermatogenesis]]. Round cells called [[spermatogonia]] divide and differentiate eventually to become spermatozoa. During [[copulation (zoology)|copulation]], the [[cloaca]] or [[vagina]] gets [[insemination|inseminated]], and then the spermatozoa move through [[chemotaxis]] to the ovum inside an [[oviduct]].

In [[assisted reproductive technology]], normozoospermia is referred to a total amount of >39 mill [[Ejaculation|ejaculated]], >32% with progressive motility and >4% normal morphology. Also, a normal ejaculation in humans must have a volume over 1.5 ml, being an excessive volume 6 ml per ejaculation ([[hyperspermia]]). An insufficient volume is called [[hypospermia]]. These problems are related to several complications in spermatozoa production, for example:
* Hyperspermia: usually provoked because of [[prostate]] inflammation.
* Hypospermia: an incomplete ejaculation, usually referred to an androgen deficit ([[Androgen deficiency|hypoandrogenism]]) or obstruction in some part of the [[ejaculatory duct]]. In laboratory conditions, is also due to a partial loss of the sample.
* [[Aspermia]]: there is no ejaculation. It could happen due to [[retrograde ejaculation]], anatomical or neurological diseases or anti-hypertensive drugs.