i was pg at 16 whilst doing my gcse's. I had ds1 at 17; ds2 at 19 and have just had dd at 23. I also have a dss who is 6.
We are married,together 5 years, i have done a degree and 4 A-levels since having dc.
You can be a good parent at 16 or a rubbish one at 40 - its down to the individual. Some teens will find it hard - you have to be quite selfless as a parent.....but again others will find that hard at 40.
There are pros to being so young, i dont get tired, but i think that has to do with my dh being the best man i know and an excellent father and husband to me.
I loved being a teen parent - i have always wanted children and will prob have another one.