1. Manifestations of calcium deficiency in infants 2. Skeletal dysplasia 3. Heart problems 4. Dental problems 5. Decreased immunity 1. Skeletal dysplasia The most common manifestation of calcium deficiency in babies is skeletal dysplasia. Since calcium is an important element in building bones, a lack of calcium can lead to stunted bone development in babies. In this case, the baby may have bent legs or body