The spores, which may be unior multi-cellular, are either abstricted free from the ends of hyphae (acrogenous), or formed from segments in their course (chlamydospores) or from protoplasm in their interior (endogenous).
Various stages in the development of the endogenous spores in a Clostridium - the small letters indicate the order.
Treatment in men elevated endogenous FSH levels are indicative of primary testicular failure.
Higher levels of endogenous interferon gamma were found in women with recurrent first trimester miscarriage compared to women with normal pregnancy.
In addition, endogenous opiates, endorphins, produced as a defense against pain, may remain in the circulation, producing lethargy.