Folic acid is critical to the normal formation of the vertebrae and spinal cord
during the
A. cleavage of the blastocyst
B. formation of the blastocyst
C. first trimester of development
D. third trimester of developmen
during the
A. cleavage of the blastocyst
B. formation of the blastocyst
C. first trimester of development
D. third trimester of developmen