After giving birth to your baby and especially whilst breast-feeding, you may feel low in energy, dizzy at times and notice that you are losing more hair than usual. These are signs of depleted Qi and Blood.
Here is a link to a great website that outlines ways to boost your Qi and Blood with certain foods.
http://acupuncture.rhizome.net.nz/Deficiency/Dietandpostnatal.aspx
Acupuncture and herbs also help to boost the Qi and Blood by improving digestion and therefore increasing absorption and energy production.