The company published a quality assurance study for the Panorama test last month and is wrapping up the SMART study, which has enrolled 20,000 women.
The company and Women & Infants Hospital of Rhode Island are currently evaluating the technology to determine the performance of the test.
During the first year of the TRIDENT-2 study, 74,000 women opted for NIPT, which was switched from in-house-developed platforms to Illumina's VeriSeq in May of this year.
By early 2020, the UK company plans to develop a version of its Iona test that uses Illumina's sequencing technology.
A randomized clinical trial from France revealed similar miscarriage rates in women who had cell-free DNA screening for trisomy 21 prior to invasive testing.
The partners will test PerkinElmer's Vanadis NIPT platform on samples from 2,650 women to determine detection and false positive rates.
The report states that using NIPD for trisomy 21 in high-risk women could "probably reduce" the total number of invasive tests though the data is incomplete.
The company plans to launch the system this summer in Europe, aiming to broaden cell-free DNA screening for trisomy 21, 18, and 13.
The suit alleges that Natera's Panorama test infringes US Patent No. 9,493,831 patent, which covers sequencing library preparation methods applied to maternal blood samples.
The company is now seeking commercial partners in Brazil to make the Iona test available in the country.