Why is my uterus of a bigger size?

Q: I am 25 weeks pregnant with my first baby but my uterus measures 28 weeks. What is the cause for this?

A:There maybe several reasons for a bigger size uterus, like wrong dates, big baby, diabetes, excessive fluid, or twin pregnancy, among some of them. You need to have an ultrasound to find the cause, and also maybe a blood test to rule out diabetes. Please follow up with your obstetrician.