I don't know how my mom ate when she was pregnant with my brother, but he was a big baby. Once she was at work and this lady was like "your just jealous that I can make big babies!" and then my mom was like "Really b/tch, really?" (not really, but I think it's funnier that way.)
If you eat unhealthy while pregnant your child will be naturally chubby for the rest of it's life because the proportion of food it receives while developing will be what it gets used to and it consume that big of proportions for the rest of its life.
THEY'RE SUPPOSED TO EAT HEALTHY AND STUFF