I'm a nurse in a maternity unit at a hospital and my experience is getting weirder

I have been a nurse for about 8 years now and have been in my current maternity unit for 6 years. Obstetrics nursing can be quite routine, so I'm sure you're wondering what could be strange about this. But just hear me out, and imagine you were in my shoes, looking at a room of complete strangers that are there for one reason, is where I've been for 6 years. I have never seen this until recent years (2) but all of our patients who come in for deliveries seems to be all younger and younger. It's now not uncommon to see 15 year olds, 16,17,18 and all usually have partners that look to be about their age. As a nurse you have access to patient medical records, which includes their full name, address, date of birth and history of past medical conditions and illnesses. All of the patients that are young seem to have similar names, places of birth and same prenatal care facilities. It's just so weird, I'm not sure if anyone has noticed this. But there is a lot of young girls having babies and they all seem to basically have the same information in their charts.