**6. Conclusions**

Vitrification as a method for cryopreservation in porcine applies thus far to small samples that can be managed at high cooling and rewarming rates without need of applying permeating CPA of potential toxicity. Therefore, the technique has developmental potential for oocytes, COCs and embryos for IVF and ET. Boar spermatozoa are yet to follow this path, and although there is a potential breach for vitrifying limited volumes of sperm suspensions, such approach is yet solely academic in nature. Semen for breeding ought to be frozen conventionally, albeit with a focus on increased cell lifespan, and managing concentrated semen doses for deep intrauterine AI. There is much yet to be learned from the ejaculate and the relationships between specific components of the seminal plasma and sperm function.
