How do you know the size?

Mel

I've been seeing a lot of people posting how big their baby is right now. My doctor has not offered any kind of scan or suggestion as to how big the baby is. I was getting vaginal ultrasounds every 2 weeks from 16-24 weeks that told me size but after that nothing. Also, I haven't had any internal exam since I first found out I was pregnant. Is that normal? I'm 34+5 right now.