lj,
i had my first child at 40 and had a fantastic pregnancy and did not feel bad with the all nighters with a newborn. We have been TTc no 2 since then and while at 41, I cuold not picture myself still trying at 45, here we are still trying. I don't think it is too old although it freaks me out thinking I might be 60 with a 14 year old. but 40 is definitely not too old. there is a thread someone started a few weeks ago about people over 40 and trying. I am sure they would love to hear from you.