The growth of the world population, which is currently close to 7.5 billion people, of whom 690 million are in a situation of hunger. of which 690 million are in a situation of hunger, this indicates the large food deficit that currently exists in the world. food deficit that currently exists in the world, every day the demand for food will be greater, especially for animal protein. demand for food will be greater every day, especially for animal protein. The different animal species constitute a great alternative in the solution of this problem. However, they can be seriously affected and therefore prevented from achieving this goal. and therefore impeded to reach the achievement of this objective, this affectation can occur in fertility and prolificacy, which obey the and prolificacy, which is due to different causes, which can be classified as infectious and non-infectious. and non-infectious, the first ones have been widely studied since long ago, while the second ones are nowadays the latter are currently the subject of research.