Why the guess work...?

Amanda

This is baby #3 for me. My first two measured right on track for Funda height, yet this time I'm measuring 3 weeks ahead, and my midwife says that baby feels bigger than what my weeks are. I understand the 20w ultrasound is supposed to be pretty accurate at dating the pregnancy/baby's gestation, but instead of all the guess work and saying that I could go into labour soon already, why not just send me for an ultrasound and take the guess work out of everything???

Thanks for reading my rant.