Endocrine Abstracts

Klinefelter syndrome (47XXY male) (KS) is the most common sex chromosome disorder in men. The phenotype is diverse including: infertility, hypogonadism, impaired cognition, behavior disorders, increased autoimmunity and osteopenia. We have studied osteopenia, learning dysfunction, germ cell loss, and testosterone deficiency in 41 XXY mice bred by two separate methods. We have characterized the germ cell loss by apoptosis and germ cell migration as the mice progress from day 1 ...