Since 1940, when it was founded in Huancayo Laboratory of the Institute of Andean Biology, we have been interested in studies of reproductive physiology in relation to height, and as we progressed in our research, emphasized increasing the need for deepen this work, both in the field of endocrinology and early embryology, points began to study in 1947 with experience at sea level and were intended to serve as a baseline for future work at altitude, but the results we have been getting on these experiences, along with the spread and increasing use in the daily practice of medicine, not just products ganadotrópicos both equine and human origin, but also of ovarian hormone products, has led us to submit this thesis in the hope that it can serve as a contribution to elucidate concepts in the use of these hormonal products.

Differences were observed reaction in the two species studied. Instead of altitude results in increased excretion of metabolites derived from sexoides, cortical and gonadal steroids, variations are more pronounced in rabbits. These results raise the possibility that nonspecific adaptive mechanisms in which predornina protein catabolism, so fleeting that would go unnoticed in observations that are made within 4 days of the change in altitude and rather indicate that in adapting to the height mechanisms exist predominance of protein anabolism. The association of high and ACTH not mask the excretion of metabolites derived from steroids sexoide type. The association of high serum gonadotropin treatment and intensifies, in the rabbit, increased metabolites latter while a reaction in the guinea pig, similar to what occurs with only the altitude change is observed.

Differences were observed reaction in the two species studied. Instead of altitude results in increased excretion of metabolites derived from sexoides, cortical and gonadal steroids, variations are more pronounced in rabbits. These results raise the possibility that nonspecific adaptive mechanisms in which predornina protein catabolism, so fleeting that would go unnoticed in observations that are made within 4 days of the change in altitude and rather indicate that in adapting to the height mechanisms exist predominance of protein anabolism. The association of high and ACTH not mask the excretion of metabolites derived from steroids sexoide type. The association of high serum gonadotropin treatment and intensifies, in the rabbit, increased metabolites latter while a reaction in the guinea pig, similar to what occurs with only the altitude change is observed.