Teen pregnancy

I want to know some other opinions so my niece and her boyfriend have been dating for a few years now and they want to start a family she’s 16 and he’s 17 and they both have jobs and he graduated early from high school and co owns a business with his dad and my niece does online school and is also going to graduate early and she plans to go to college they really want to have a baby now they say they’re ready but I think they would be ready if the were older what do y’all think??