How legit is BMI? Is it ridiculous? Or accurate?


I am 24.5 weeks along and was at the doctor today and they say i gained a little more then I should have. I have gained 14 pounds ... according to their charts I started out overweight because my BMI is 127. I am a bigger built person and weighed 168 when i got pregnant. My ideal weight is 163 but i honestly didn't think I was fat, although I realize I am not a skinny person whatsover either! I come from a family with thick legs , wide shoulders, big hands etc. How does this play in? I am frustrated that they think I am gaining too much because I try quite hard to be careful. And I'm so hungry! And I do some excerciseing. Is 14 pounds way to much for 24 weeks ??