Hello doctors, my wife conceived through IVF and it was a PGS tested euploid embryo. Now we are at 12 Weeks 6 days. NT scan seems to be completely fine but the double market ratio was high risk for trisomy 13. Doctor suggested not to worry as the trisomy 13 defects are usually visible on the scan so it might be false positive. To rule out them, they suggested we go ahead with NIPT. We gave our NIPT but worried. Based on your experience, can you let us know if there is anything to worry about? And what is the accuracy of the double marker test? Thank you in advance. Reports attached.