Does hyperthyroid affects man fertility? i heard some people recover from hyperthyroid will be hypothyroid, and that affects man testosterone?

Has some effects...: Dr. Stephan shaban has a detailed article at http://www.Ivf.Com/shaban.Html it says both hyper and hypothyroidism can alter sperm production. Hyperthyroidism affects both pituitary and testicular function through alterations in the amounts of releasing hormones from the pituitary (that influence testosterone production), and in increasing the conversion of androgens (male hormones) to estrogens.