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Use in pregnancy: Hypercalcemia during pregnancy may produce congenital disorders in the offspring, and neonatal hypoparathyroidism. However, the risks to the fetus of untreated maternal hypoparathyroidism are considered greater than the risks of hypercalcemia due to vitamin D therapy.
Use in lactation: Vitamin D is distributed into breast milk, and its concentration appears to correlate with the amount of vitamin D in the serum of exclusively breast-fed infants. The American Academy of Pediatrics considers the use of vitamin D to be usually compatible with breast feeding, although they recommend, if the mother is taking pharmacological doses of vitamin D, that the infant be closely monitored for hypercalcemia or clinical manifestations of vitamin D toxicity.
