I remembered some other good ones...
My ex-FIL told me "You may think you're vegan, but there's no way you're making it through this pregnancy. My hippie friend back in the 70's was vegetarian, but once she got pregnant she was eating McDonald's every day!" Yeah, well, 3 pregnancies and 9 years later, still vegan. I know some people start craving meat and whatnot, but it's not a certainty at all! When I'm pregnant, meat, dairy, and eggs gross me out way more than usual. And I'm just SURE McDonald's every day is good for the baby... right.
My grandmother told me that back in her childbearing years (50's), the pediatricians would have her express some milk into a glass, then they'd swirl it around and see if it was thick/ fatty enough to coat the glass, if it wasn't they'd say the milk was no good and that she'd need to formula feed!
And of course I got lots of "Your kids are going to be so dependent on you and never be out of your bed, etc., etc..." But I doubt anyone will say that with this baby, since my daughters as independent as you could imagine, people are telling me all the time how amazing it is that they are so independent and confident. Of course, there's always room to be surprised. Who knows what I'll get this time around, but nothing so far!