Do 2nd babies arrive early or late?

Amy

I'm 33w pregnant with my second boy. Feeling a lot more uncomfortable than I did at this stage last time. Can't get my head around being pregnant for another 7 weeks! My boobs have started to produce a tiny bit of colostrum, is that a sign that baby might arrive before 40w? I hope so! Don't want him to be premature but 37 or 38w would be fine by me! Anyone know if 2nd babies are statistically more likely to arrive early/late?