known and possible interactions between ca , p , mg , parathyroid hormone ( pth ) , calcitonin ( ct ) , vitamin d and its metabolites , and interactions of each of these with other factors plus complexities and possible variations between and within domestic animal species , such as age , sex , physiologic state ( i.e. , pregnancy , lactation and growth ) and diet , make ca , p and mg metabolism extremely dynamic and complex .
C0014695
vitamin d
C0032961
pregnancy