Unilateral thyroid agenesis (thyroid hemiagenesis) is a sicknesswhere one lobe of the thyroid gland fails to growth typically and thisis thought to be the rarest of all the developmental thyroidanomalies [1].Нe first opinions of this entity regarded in 1866 by using +Dndfield--ones,in 1876 thru Luschka and in 1886 via Ehlers [2]. . НyroLdhemiagenesis is a rare situation with only about 270 instances said inthe arena literature up to 2003 [2] and nevertheless only about three hundred cases , mostas case studies via the usage of the one year 2010 [3].НroLd hormones (THs) alter many functions of fetaldevelopment  Also, the balance among antioxidants/prooxidants is crucial for the cell homeostasis and for theimprovement [30,5-10]. НLs protection might be facilitated by way of using thematernofetal thyroid states [2,5,6,31,32]. Additionally, the defensemechanisms toward free radical-caused oxidative stress contain [2,33](1) preventative mechanisms; (2) restore mechanisms; (three) physicaldefences; and (4) antioxidant defenses. Alternatively, it changed into additionally saidthat reactive oxygen species (ROS) may additionally moreover play crucial roles in numerousdevelopmental and physiological strategies, but while being inexcess ROS can reason oxidative harm