The only reason that the next bub will prob be bigger is cos your uterus hadn't had time to shrink all the way back to where it used to be before babies ... my SIL had her baby today, 9 pound 10 ounces ... she had a little girl in August last year ... 9 pound 15 ounces ...

I wouldn't worry about what other people are saying ... you might need a little extra help but particularly if it was planned you know what you want.

Good luck with it!