A micropenis is term refers to a stretched penis that is less than 3/4″ in length at birth. Micropenis is usually the result of atypical hormonal and chromosomal conditions during fetal development. It may be – but is not always – related to syndromes such as androgen sensitivity, Klinefelter’s Syndrome, Turner’s Syndrome or Down’s Syndrome. Approximate 0.6% of penises are classified as micropenises.