Spermatogenesis

Testicle	Testicular / epididymis	Epididymis
		Storage
Sperm move out of the resting pool every 3-4 days	They take 35-42 days to develop and mature	They are then stored. Max concentration reached in 4-5 days of none use.

Factors that can affect spermatogenesis

Heat	32C for 2 days – i.e. Summer time
Pyrexia	40C for one day – Erysipelas or Swine Influenza
Disease	Brucella suis
Feeding	Over feeding – fat boars It is difficult to affect semen production by feeding. Cb and Zn may be raised as micronutrients.
Size of testes	A boar with larger testes tends to produce more semen
People	A conscientious stockperson with warm hands will maximize semen output