👉 Ectrosyndactyly is a condition in which the baby's lower leg does not develop normally. This means that the baby's feet do not fully develop, and they are unable to walk or stand on their own. It can be caused by a number of factors such as genetic differences, birth defects, or even environmental factors like poor nutrition. Ectrosyndactyly is a rare condition, affecting about 1 in every 300,000