is described as delayed puberty
with exceptions when an organism has passed the usual age of onset of puberty
with no physical or hormonal signs that it is beginning. Puberty
may be delayed for several years and still occur normally, in which case it is considered constitutional delay
, a variation of healthy physical development. Delay of puberty
may also occur due to malnutrition, many forms of systemic disease, or to defects of the reproductive system (hypogonadism) or the body's responsiveness to sex hormones.