Oh, I'm so with you guys on this one... I was 20 when I fell pregnant with my first bub, my mum nearly hit the roof when we told her but I guess I can understand because my man and I had only been together about a month when she was conceived (we'd actually only just moved into our first house together six days before we got her in the oven)... but she soon got over it, especially once we got married ('Haha, she's got him now!! No easy way out!' I'm sure she thought), it was more the comments from strangers that annoyed me.
I remember shopping for some new clothes with mum (hubby takes the car to work so mum and I go shopping together all the time) and I chose a dress because it had room for me to grow, the manager of the store who we chat to all the time was like, 'OMG aren't you still in school though, and you're pregnant?!' Mum was like 'She's turning 21 in a few weeks' and the girl was like 'No way, I was positive you're only 17!!'
I still get carded for cigarettes so I guess I look pretty young...

The worst one was when I was about to drop, I was out and about one day and this insane woman in her 30's came up to me and started pointing at my belly (which was HUGE compared to the rest of me) and ranted on and on about how I was a disgusting human being, I must only be doing it for the money and that it was horrendous for her to see 'little girls like you BREEDING like rabbits' because she was going through IVF and hadn't been successful. Well, I'm sorry I can do what nature intended and you need help, but my age has nothing to do with how good a parent I'm going to be, same as my tattoos and piercings and 'weird' clothes aren't going to make me a bad mum. I was so upset at her ravings I didn't leave the house for a fortnight because I was scared everybody was thinking things like that about me, but I've learned just to hold my head up and give them 'the look' (which is especially effective when you have a face full of studs and a tattoo across your chest from shoulder to shoulder).

I just think it's crazy how judgmental society is towards young parents these days, my husband and I were friends for ages before we got together and we had both talked a lot about how we wanted to have kids before we were 25 because then we could focus on career later, and have less to worry about as far as age-related risks go (Down's Syndrome etc)... and even though we were pretty broke when we got pregnant, things are only getting better and better as we get older and we don't think for a second that having a house paid off, a Lexus in the driveway and enough to send our kids to a prestigious Catholic school is the way to raise kids. We think it's more important to have a mum and dad who love them to bits and can teach them that money can't buy them the important stuff in life, and there has never been a day we haven't been able to pay our bills or put food on the table so I don't see what people are so worried about.
Also, our grandparents got married straight out of high school and had a bunch of kids by the time they were in their mid-20's, so why is it suddenly such a horrible thing to have kids before you're 35? For us, there was no worrying about 'finding ourselves' or 'having a life' or 'playing the field' - we knew that we were meant to be with each other so there was no need to date a million other people just to make sure. We have no desire to travel the world or get drunk every weekend so having a family young and just living for that is perfectly fine with us.