I agree with Fixthebone, whom I've quoted below, as it certainly bears repeating. The risk of infection at that age isn't worth it, never mind the fact that ears do grow (and not always evenly) from infanthood to adulthood, and there's no guarantee that the holes will be even when the baby grows up. Then there's the pain your baby goes through, and the fact that the baby may pull on her ears and cause an infection or tearing. I see no reason to risk any of the above, as earrings provide no actual benefit.
"I think it's barbaric to have a baby's ears pierced.
About ten years ago, I spent an hour and a half doing chest compressions on a 6 week old, sticking intra-osseous needles into their femurs and trying to get them breathing again after they had had a cardiac arrest from staphylococcal septicaemia from an infected piercing.
I wish anybody considering this could hear the piercing screams of the mum stood behind me when we stopped attempts at resuscitating, it still haunts me to this day, almost more than anything I've seen since in my career, and I've seen things that should scar most people for life."