Con, I agree with No doubt. Don't pay attention what others say, listen to your dr. You can not tell the size of the baby fro the size of the belly, waters, blood volume, placenta, your abdominal fat..
My dr. yesterday told me "you are 20 weeks and your baby is still small". I am thinking he is big, compare weeks ago!
I just came back from the dentist and she told me I have gingivitis. I have never had it in my life and it's pregnancy related, the hormones thickens saliva and more bacteria get trapped in. She suggested to do a professional teeth cleaning now and before the birth. I did. My teeth feel so wondeful. Also, she looked at my teeth w/o x-rays she could see 3 cavaties but she is only 60% sure we'll wait till the birth to look at those closer. The bad news is that she suggests to pull out my 2 wisdom teeth cos they have cavaties and it's really hard to fix them. This is insane, I have to pull my teeth, when they don't cause me discomfort.
My dr. told me to clean my teeth everytime I eat 2 min after. I have to floss 2 times a day, listerine is a pregnancy safe liquid.
Another tip she gave me, don't lay down on your back after 7 months of pregnancy. If you go to a dentist you have to tell them to incline the seat.
Ladies watch for your teeth and take care of them very well!