During puberty, hormones play essencial roles in the body and processes of growing up. If during that age a girl`s body is unable to produce estrogen or progesterone, it means that a few events won`t happen. One of them is the menstrual cycle. Both estrogen and progesteron work together for the maturation of oocytes, and in the lack of estrogen and progesteron, the girl wouldn`t be fertile, and besides that, the changes that the endometrium has to go through during the period wouldn`t occur. Also, changes in the body such as breast growth and hip enlargement will also be hampered, because they are associated to those hormones as well. In the case of a boy`s body being unable to produce testosterone, the sperm production would be affected, and the boy would be infertile. Other processes like hair and genital growth, muscle gain and voice deepening would be negatively affected.
