In the early months, it often brings with it appetite loss and vomiting that is not observed in any otherdomestic female and shows the body's revolt against the species taking possession of it; the body loses phosphorus, calcium, and iron, the last of these losses being very hard to overcome later; the metabolic hyperactivity excites the endocrine system; the negative nervous system is in a heightened state of excitability; the specific weight of the blood decreases, and it is anemic, like 'that of people who fast, who are starving, or who have been bled many times, and convalescents.'