IGF1 and pituitary dwarfism: This finding supported the hypothesis of Simianer and Köhn [3], that the minipig experiences a form of pituitary dwarfism, comparable to Shetland pony and Dexter cattle, supposedly caused by a deficiency of IGF1. This hypotheses seems natural, since the effect of IGF1 on growth in, for example, Pygmies [36] is known for long.