Fertility in men with Klinefleter syndrome.

Klinefelter syndrome is an important cause of infertility among men. Although early development of the testes may appear normal, there is profound loss of germ cells during early-to-mid pubertal maturation. Spermatogenesis may be preserved in a small percent of tubules and these tubules may be available to artificial reproductive techniques for the retrieval and subsequent in vitro fertilization of extracted ova. Ethical and legal issues including risk-benefit consideration must be evaluated before implementing fertility preservation procedures in minors.