Is there any reason that my 3 week old baby would need an Iron and Polyvisol supplements? My doctor said that it would be a good idea. He is fully breastfed. Things seem to be going very well except his weight was a little below birth weight at almost 3 weeks. But he did grow 1.5 inches. I am just really confused and would love some advice.
His output and latch are perfect. I am confused