Fertilizers help replenish the nutrients used by the growing plant. Similarly, Iron, Folic acid, Vitamin B12 and Calcium stores are used by the growing infant and hence mother needs to replenish her stores regularly. Especially because environment around us today is more depleting rather than nourishing.
Learn all about the function, food sources and quantity of these nutrients required by you to enable the seed (inside you) to grow into a healthy sapling.