To young to be pregnant

There are so many young girls on glow who want to be mum's. 17,18,19,20 isn't a age to be a mum you have your whole life ahead of you. Instead of being a mum so young why don't they complete there education, get a good career or go travel and see the world or even go to a gig. Being a mum is a full time job once you have a baby you can't return that baby. Bring up a child take a lot of patience it can be mentally and physically exhausting and you can't forget the financial side of it. What is even more worrying is how so many young girls want to get married why the rush.