When babies were born in ancient Rome, their parents had to go to a special office called the "praetor" to register them. This was important because it made the baby a official citizen of Rome, which meant they had certain rights and could do things like vote and own property when they grew up.
The parents had to give the baby's name, their own names, and where they lived to the person at the praetor's office. Then, the baby was given a special name based on the day they were born. For example, if a baby was born on a Tuesday, their name might be "Martius" (meaning "of Mars," the god associated with that day).
Once the registration was complete, the parents received a special certificate called a "breve" as proof that their child was a citizen of Rome. This was important to have because it allowed the child to participate in important events like voting or joining the military when they grew up.
Overall, birth registration in ancient Rome was a way to make sure that everyone who was born there was officially recognized as a citizen and had access to certain rights and privileges.