Ultrasound to perform tests on due date.

Natalie • Wife and mother of an eight year old boy and a 16 month old girl!

So my doctor said that if I don't go into labor by Tuesday the 20th, they're going to do an ultrasound to check fluid levels and four other things. If she fails any one of them, I will be induced that day. This confuses us because this pregnancy has been textbook normal the entire time. Why would they suddenly spring something like this on us? I don't remember all of the other things they're testing for but a couple of them were breathing motions and limb extensions. Has anyone else had to have this done on their due dates? Everyone is so confused over this. If anyone knows anything about this, we'd love to know! Thanks!