Thanks, Mike. Good afternoon, everyone, and thank you for joining us. Let me get into the highlights. Q2 was another very strong quarter for Natera. We processed 234,000 tests in the quarter, which was essentially on par with our all-time record Q1 volumes, despite the obvious impacts from COVID-19. We generated $86.5 million in revenues on a 46% gross margin and grew product revenues approximately 24% year-on-year We started enrolling patients in three separate large prospective trials, BESPOKE and IDEA-CIRCULATE for Signatera in colorectal cancer and the proactive trial for Prospera in kidney transplant rejection screening. These are key trials that we believe will extend our leadership position in these areas. I'm sure many of you saw that we have now completed the process to get reimbursed for Prospera. And so far, we are being paid as expected by CMS. We were very pleased to receive the Force of Change Illuminator Award from Leading Women Entrepreneurs, which is an organization that is recognized over 500 outstanding women leaders in innovative companies over the past day. Sheetal Parmar, who leads the Clinical Services and Medical Education teams at Natera and is Cochair of Women of Natera, an employee resource group that supports workplace equality and diversity was also recognized for her individual contributions in Natera’s mission and values. So we just wanted to say thank you and congratulate Sheetal and the women of Natera for their leadership. In our oncology effort, first in IO monitoring. Just this week, we saw the publication of a groundbreaking validation study in Nature Cancer, demonstrating Signatera's ability to monitor tumor response to immunotherapy in 25 different types of solid cancer. Second in colorectal cancer, we presented data at ASCO and ESMO GI that supports the use of Signatera for metastatic colorectal cancer, with a prospective publication to follow. Based on the strong data, I'm very pleased today to announce two new clinic expansion opportunities where we're seeking reimbursement for Signatera, as you can see on this next slide. We think together these new opportunities represent approximately 900,000 additional tests per year, nearly doubling our previous addressable market associated with stage two and three colorectal cancer. So all combined, we think we have a clear path for reimbursement and commercialization in clinical settings that represent roughly 2 million tests per year. In IO monitoring, we have already completed a positive pre-submission meeting and formally submitted our dossier for local coverage decision to Medicare and what would be our second major reimburse clinical indication for Signatera. In metastatic colorectal cancer, we plan to submit this indication to expand the previous colorectal cancer indication soon. Solomon will describe these indications in more detail later in the call. The next slide shows our volume performance by quarter. Each of the last few years we've seen a very large step up in the Q1 volumes over prior years. And then due to seasonal factors that we've described in the past, Q2 volumes are typically just below Q1. In 2019 Q2 volumes pulled back 3% from Q1 2019. This year in 2020, we saw a smaller pullback of about a half percentage point versus our record Q1 2020. This is remarkable, given the scale of the disruption to the economy in Q2. During the onset of the COVID-19 outbreak, we immediately saw a drop in our weekly received volumes of about 15% in the last two weeks of March and first few weeks of April. And then we saw weekly volume starts to recover toward Q1 levels, as our existing customers and the accounts we won early in Q1 figured out how to reopen their practices to maintain critical services, like non-invasive prenatal testing. Mike will talk more about the outlook later in the call. But we're feeling good about our existing customers ability to weather COVID-19 surges in the second half of the year. In order to grow, we also need a new - to win new accounts. While I still think it's clearly easier to win new business when a rep has unfettered access to a clinic, we have made good use of our remote tools. And we built and have a number of encouraging customer wins since our last earnings call. So we're monitoring the situation as you'd expect, but we're cautiously optimistic about the second half of the year. The next slide shows a revenue trajectory over time. I’d note that partner revenue recognition in Q2 of 2019, included $5 million from BGI compared to only about $1.2 million for BGI and Foundation Medicine combined in Q2 of 2020. So the underlying product revenue trends in the business remain very strong, as I mentioned. The next slide is our typical ASP and COGS view, which came in as we had expected, and I think shows our momentum is intact. On the ASP front, we had both headwinds and tailwind in the quarter. As expected, our IVF channel was much more severely impacted than our core channel, as it was initially considered elective, and many centers closed. The products we sell in that IVF channel have a much higher average price per test than the core reproductive health channel. So we suffered a bit from a less favorable product mix. I think that's more of a timing issue. It's likely that a lot of these IVF customers that were put on hold in the spring will find a way to push forward in the next three to four quarters, so the IVF volume I think can swing in our favour when that happens. The main tailwind we had was Aetna, extending their average risk NIPT coverage due to the pandemic. And we just saw over the weekend that they've chosen to extend coverage now to the end of the year, which of course we were very glad to see. So I view this ASP result as more or less status quo, as expected given the factors outlined. One other long term potential benefit to both ASP and average risk adoption is the publication of the SMART study. The study enrollment is now completed, and we expect data to be published and presented around the SMFM conference in roughly six months. As a reminder, SMART is a landmark 20,000 patient multi site prospective clinical trial we've been running for the past five years. We expect multiple papers from the study, one focused on fetal aneuploidy in both average risk and high risk pregnancies, and one focus on microdeletions. The aneuploidy data has been analyzed and the microdeletion data has yet to be released. Although we can't comment on the performance, because this is the largest perspective, average risk aneuploidy and microdeletion trial to be completed, we think SMART could have a positive impact on society guidelines and coverage policies for both indications. We also expect to generate additional demand for Panorama given our leadership in clinical validation data that extends further with the SMART trial completed. I've got largely the same takeaway for COGS per unit in the quarter. We added some redundancy to fortify our lab operations team to make sure we are robust to COVID-19, including the expansion at our Austin lab facility, and we anticipate needing to maintain that redundancy over the next few quarters. Having said that, the new workflow improvements coming out R&D that have caused a step change improvement versus last year performed even better in Q2 than they did in Q1. So we're very confident our plan for COGS below $200 for the reproductive health business is achievable. Now last point getting below $200 for the reproductive health business it's important to note,, as our product mix changes to include new products like Signatera, the average COGS will change as well. So we'll track these overall metrics, but I anticipate giving some separate color in the future on reproductive health COGS. You will recall, the number one goal in the company is to get the reproductive health business to cash flow breakeven. This comes from strategic volume growth, stable ASPs and COGS getting lower. Despite all the impacts from COVID-19, all of the variables that we've just walked through give us the confidence that we are on track to achieve that goal, while we rapidly scale the new business. Just one more check-in second slide on our operational response to COVID. The mobile tools for patients and customers which have been available for years are scaling nicely. We've seen this mobile offering proved to be particularly critical and starting new accounts for Signatera and Prospera, given these patients tend to be you know compromised and also have a critical need to be consistently monitored. I mentioned the Austin lab expansion as well. This was executed smoothly despite the pandemic. The Austin lab gives us critical redundancy to our California lab and offers capacity of more than 2 million tests annually and it should in the future offer additional cost of goods sold efficiencies once at scale. We've also launched a wide array of safety and protective testing protocols for both labs and feel confident we have a good model for consistent operations in this new environment. Okay, now, let me shift the focus to the Transplant business. As I mentioned, we're very pleased to get final reimbursement for Prospera. This slide is the same slide we first presented in 2018. And we're now happy to retire it. As you'll see later in the call, we of course following the same path now for a number of indications and oncology. We've been able to submit claims to Medicare for Prospera and so far received reimbursement consistent with the final pricing of 2841 per test assigned to us by the MolDx program. So we have now executed our commercial launch. We described on our last call the success we had during our pre launch phase for Prospera, in which we demonstrated that we could access a broad swath of the transplant centers. We're still in the early days of the launch. And despite the ongoing pandemic, we continue to feel confident that Prospera can be a significant contributor for the company. As described on the next slide, we've continued to generate data and improve the performance of the test. Given that we have run more than 2 million cell-free DNA tests commercially at Natera, we built up a huge data set that we can query to further refine Prospera's algorithm. This spring, we launched an improvement to the algorithm that identifies patients with elevated background levels of cell-free DNA in their blood. This can provide critical information. For example, we've seen patients affected by COVID-19 can have very elevated levels of background cell-free DNA. Being able to identify elevated levels of background DNA allows us to identify patients who might be at risk of a false negative result, where the donor signal is simply diluted by an extremely elevated background signal. So we presented several case studies on this new technology at ATC this year. And we also announced the launch of a prospective trial, the PEDAL study to externally validate this enhanced algorithm. And we plan to run that study in 500 patients across several major transplant centers. Dr. Brennan from Johns Hopkins and Dr. Bunnapradist from UCLA introduced the study at ATC to great perception. These are two premier physician researchers from two of the largest and most prestigious centers in the world. We're excited to leverage our scientific expertise and our leadership and cell-free DNA to help transplant patients and we look forward to continuing our early success in the second half of the year. Now, let me hand the reins over to Solomon to cover our progress in oncology. Solomon?