Pica--consider the possibilities.
D002118:Calcium; D005260:Female; D006801:Humans; D008903:Minerals; D009747:Nutritional Physiological Phenomena; D009751:Nutritional Requirements; D010758:Phosphorus; D010842:Pica; D011247:Pregnancy
D008903:Minerals; D010758:Phosphorus; D002118:Calcium