I just had an interview with a prospective client and she mentioned that she had a low reading on the PAPP-A test. Since this is a relatively new test, none of her providers seemed to have any idea what that really meant and are proposing a late 3rd trimester ultrasound. She is hoping to avoid the u/s, especially since she has a good understanding of the slippery slope that could ensue as a result.
I feel comfortable with discussing the pros and cons of testing, informed consent, etc., but this test specifically, I have no knowledge of. Would you please share your thoughts and any info you may have? How specific is it? What does a low reading really mean? What would an ultrasound tell them?