Congenital hypothyroidism is a critical and relatively common endocrine disorder that affects newborns, resulting from an underactive thyroid gland since birth. This condition occurs when the thyroid gland fails to produce an adequate amount of thyroid hormones, essential for normal growth and development.
Congenital aganglionic megacolon, also called Hirschsprung disease, is characterized by persistent constipation resulting from partial or complete intestinal obstruction of mechanical origin.
The ductus arteriosus is a fetal blood vessel that connects the pulmonary artery to the descending aorta. In patent ductus arteriosus (PDA), the lumen of the ductus remains open after birth.