This could be a case of simple syndactily, which is a medical term for webbed or conjoined fingers and toes. It’s among the most common malformations and affects 1 in 2,000-3,000 kids every year. According to the Children’s Hospital of Philadelphia, the condition occurs while a baby is still in the womb. During the 7th to 8th week of an infant’s development, fingers and toes separate. Well-developed fingers and toes are crucial in early childhood when one is rapidly developing motor skills.