Final answer:
Maggie is most likely to develop iron-deficiency due to the heavy blood loss during her menstrual periods.
Step-by-step explanation:
Maggie is most likely to develop iron-deficiency due to the heavy blood loss she experiences during her menstrual periods. The excessive blood loss can lead to a decrease in iron levels in her body. Iron deficiency anemia is a common condition in women of childbearing age due to blood lost during menstruation. It can be prevented or treated by ensuring an adequate intake of iron through diet or supplements.