U know how they measure uterus growth from the top of pubic bone too the top of the fundus... what does it mean when those measurements don't add up too how many weeks u are...

My measurement today was 28cm, and i'm 30weeks... Does that just mean i'm going to have a small baby???

And how to i make blob grow more~ I'm eating a healthy normal diet, and more when i'm hungry... any other options