Dr. Greene's Answer
I wouldn’t be concerned about a 4-week-old pulling at her ears. Nevertheless, I am a fan of waiting just a bit for ear piercing. My reason?
Even though the disease is not very common (thanks to immunizations), the tetanus bacteria is everywhere. It usually enters the body through puncture wounds.
I would prefer that a baby have at least one (better two) tetanus shots behind her before her big day. The first tetanus shot is usually given at the 6 to 8 week old checkup; the second at the 4 month checkup. Waiting until then would put the event at 3-5 months old for most kids. Also, babies are better able to handle the more common minor skin infections they might get once they are more than 3 months old.