I think it depends on your own situation. Sometimes stress is the trigger to
miscarriage. If you are quite sensitive and not robust enough emotionally,
it might be a good idea to settle down first.
From my own experience, being a faculty is quite challenging, especially if
you join a research university. Teaching is the easiest part, while funding
and advising graduate students are the real difficult part. It will be very
demanding to have a baby in the first two to three years. In this case, if