Low PAPP-A level?

Holly • 22 years old from Alabama. I have been married to my wonderful husband since Sept. 2012. We have a daughter. Our family was completed when our Son was born in November 2015.
So, I was aware that because I am a type 2 diabetic that I would have to go every week starting at 32 weeks for NSTs. I received my paper for registration friday at the dr, and while reading over it, I noticed that under diagnosis it says low PAPP-A levels.... This has not once been mentioned to me, so I am curious as to what it means, and why it hasn't been mentioned.