I had my first baby when I was 34. I didn't consider myself in a position to have children until I had a permanent contract in the post I wanted to achieve.
I'm extremely glad that I did that, as I have seen colleagues at a lower rung on the ladder stuck there. I am also relatively "stuck", but the difference being it's a rung that I'm happy on.
I had my second when I was 40. It's a bit later than I would have liked due to 3 years of unexplained secondary infertility, but it is what it is.
I didn't find it harder and I didn't find myself particularly special in having a baby at that age, I'd just have liked a smaller gap between my children.
Something to ponder though, you DONT HAVE TO HAVE CHILDREN. It's about 50/50 amongst my female friends, now in/approaching our 50s.
I've got to say, I've only got one friend who had a child under 30 - that maybe says something about the circles I move in, but when I was having my second and was talking to a midwife about my age, she said that the average age of a first time mother in my (relatively affluent urban area) was 34.