Is this normal??

Stacy
I'm 38 morbidly obese and 24 weeks 5 days pregnant.  My doctor wants me to have ultrasounds every 4 weeks to monitor the baby's growth.  He says this is normal but I've not known anyone else have ultrasounds like that.  He says starting at 32 weeks I will have ultrasounds and NST weekly.  I don't know if it is because of my age, my weight or what.