Along the lines of previous posts on children and careers, and "life
always turn out as you wish", I would like to add my 2 cents worth.
My feeling is most emphatically to say that if you really want
and your relationship is off to a stable place, do it as soon as YOU feel
ready. Don't wait for a convenient place in your career. As others have
stated, there isn't a convenient place. And since I am in the midst of
an almost 3 year struggle with infertility, I can attest that things may
not work the way you planned!
I am a post-doc, 34 and have only been married for 4+ years, hence
late start. My postdoc has offered much flexibility to pursue the time
consuming medical "treatments"...and there would have been plenty of time
for a baby! I never suspected that I would be in this position of possibly
not having a biological family.
From this experience, I suggest that if something (children, poetry,
sports, doin' nuthin' ) is important to you, you can make time for it and
still do the 60 hour week! Better than waking up on your 60th birthday
and deciding that you made a big omission in your life!