Most of the time, piercing of baby ear lobes will be done in a jewelry store and the used instrument will be the infamous piercing gun. Unlike the piercing needle, the piercing gun is not an instrument that meets the standards of safety; it can’t be sterilized completely as it is mainly composed of plastic and non-sterilizable metal. It couldn’t pass an autoclave cycle without melting or breaking. Also, places where they used the piercing gun mostly clean it with rubbing alcohol (rubbing alcohol does NOT sterilize!). This means you’re exposing your child to blood-borne diseases.
Infants have a weak immune system, you would not want to risk putting your child's health at risk for a body decoration that they did not ask to have. Moreover, the piercing gun does no holes in the skin, but tears it and pushes the excess to the back of the ear lobe, which makes it harder to heal than if you get the piercing done with a needle.
As a professional studio, we pierce with needles only! As mentioned in the millions of articles there is on the Internet, piercings done with a needle remove a piece of skin, which allows it to heal properly around the jewelry instead of having excess skin in the back of your lobe. That excess skin can become a sort of scar tissue commonly known as keloids. Please remember that a piercing done with a needle is also less painful and heals much better and faster than a piercing done with a piercing gun.
Finally, it is important to understand that the famous piercing "gun" was originally created to put a plastic tag on the ears of cows and cattle. This is not a tool designed for piercings, whether it is for a baby, a kid or an adult.
To conclude, we hope that the arguments we elaborated will make you think twice about piercing your baby’s ears. It is not something urgent, you can wait until your child is old enough to ask you to get pierced. If they never ask, at least you did not inflict them permanent scars.