Human: How do you know when your uterus has stopped growing? Assistant: 
Well, it’s a bit tricky. I think the best way to tell is by doing an ultrasound scan of your uterus. This can be done at around 20 weeks of pregnancy. The doctor will measure the size of your uterus and compare it to your previous measurements. If the uterus hasn’t grown in size since your last scan, then it means that it has stopped growing.