Amazon shuts down secret project to develop fertility tracker
Amazon CEO Andy Jassy speaks during the GeekWire Summit in Seattle on Oct. 5, 2021.
David Ryder | Bloomberg | Getty Images
Amazon has discontinued a secretive effort to develop an at-home fertility tracker, according to internal documents and people familiar with the matter.
The company had been working to launch a fertility monitoring device and companion smartphone app for the past four years as part of a project codenamed “Encore,” said the people, who asked not to be named because they weren’t authorized to speak to the press. The team sat within Amazon’s Grand Challenge, also known as its Special Projects division, the sources said.
Last month, Amazon told people working on the tracker that it was disbanding the team. Those being laid off will remain on Amazon’s payroll until Dec. 27, but won’t be expected to work during that time, according to documents reviewed by CNBC.
If staffers don’t secure another job by that date, Amazon will provide them with a “lump sum” severance payment equal to one week of salary for every six months of tenure at the company, the documents said.
Amazon CEO Andy Jassy has been reeling in costs companywide since late 2022, when inflationary pressures and rising interest rates led to a slowdown across the tech and consumer markets. In addition to slashing more than 27,000 jobs, Jassy has shuttered several projects, ranging from a roving sidewalk robot to a telehealth offering and a rapid delivery service.
The wave of frugality marks a distinct departure from the approach taken by Amazon founder Jeff Bezos, Jassy’s predecessor, who was known for greenlighting experimental projects and giving employees extended runway to develop them, even if they burned cash along the way. Grand Challenge was one of the hallmarks of that era.
Bezos launched Grand Challenge in 2014 as a way for Amazon to tinker with riskier projects that may or may not see the light of day. Grand Challenge was the brains behind a pair of connected eyeglasses equipped with Amazon’s Alexa voice assistant and a machine learning tool for analyzing medical records.
Other Grand Challenge projects, like the Amazon Care telehealth service, a video-calling device for kids, a virtual tours service and an augmented reality headset for meetings were discontinued.
On the morning of Oct. 28, employees working on the fertility tracker were told to join a videoconference where a director of the team informed them that the project was ending. The call lasted about two minutes, one of the people said.
A layoff notice viewed by CNBC was signed by Doug Weibel, who took over as the head of Grand Challenge after its founding leader, Babak Parviz, left in 2022 and joined Madrona Venture Group.
Margaret Callahan, an Amazon spokesperson, confirmed the layoffs and the existence of the project in a statement to CNBC. Roughly 100 employees will be laid off, Callahan confirmed.
“Following a recent review, we’ve decided to discontinue this project within Grand Challenge, and we’re working directly with employees whose roles are impacted to support them through the transition and help them find other opportunities within Amazon,” Callahan said.
Predicting fertility with saliva
The project was born out of the company’s 2020 acquisition of Wisconsin-based startup bluDiagnostics, the sources said.
BluDiagnostics was founded in 2015 by Weibel, Katie Brenner and Jodi Schroll, all of whom joined Grand Challenge following the purchase. The startup had developed a thermometer-like device, called FertilityFinder, to help women track their fertility from home by testing their saliva and measuring two key hormones, estradiol and progesterone. The results of the test were viewable through a corresponding app.
Business Insider reported on aspects of the fertility device in 2022, when its codename was Project Tiberius.
The team was working to develop its own saliva collection device and mobile app, which could predict when a user might be in the fertile window. Users could also log their period symptoms, sexual activity and other data to assist with tracking their fertility. There are similar offerings on the market from companies including Inne, Oova, Ava and Mira, along with fertility and ovulation tracking apps like Flo, Clue and Max Levchin’s Glow.
Amazon initially aimed to release the product this year, but the timing was pushed out after the team encountered technical issues with the device, one of the people said. It was a costly endeavor and required significant upfront investments for lab research and development, in addition to the high salaries for scientists and engineers, the sources said, adding that the team’s weekly overhead was roughly $1.5 million. Amazon didn’t comment on the figure.
Only one project now remains active within Grand Challenge. Its focus is on health tech, the people said.
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A Tesla Inc. robotaxi on Oltorf Street in Austin, Texas, on June 22, 2025.
Tim Goessman | Bloomberg | Getty Images
Tesla has obtained a permit to operate a ride-hailing service in Arizona, the state’s department of transportation said.
The electric vehicle company applied for a “transportation network company” permit on Nov. 13, and was approved on Monday, ADOT said in an emailed statement. Additional permits will be required before Tesla can operate a robotaxi service in Arizona.
In July, Tesla applied to conduct autonomous vehicle testing and operations in Phoenix, with and without human safety drivers on board. A month earlier, Tesla started a robotaxi pilot in Austin, Texas, with safety valets and remote operators. Tesla also operates a more traditional car service in the San Francisco Bay Area.
Tesla didn’t immediately respond to a request for comment.
Tesla plans to take human safety drivers out of its cars in Austin before the end of this year. The company is aiming to operate a commercial robotaxi service in Phoenix and several other U.S. cities before the end of 2026.
According to the National Highway Traffic Safety Administration’s website, Tesla cars equipped with automated driving systems were involved in seven reported collisions following the launch of the company’s pilot in Texas.
Competitors including Alphabet’s Waymo in the U.S. and Baidu’s Apollo Go in China are way ahead in the nascent robotaxi ride-hailing market. In the Phoenix area, Waymo operates a sizable commercial business, with at least 400 autonomous vehicles, the company previously told CNBC. In May, Waymo said it had surpassed 10 million driverless trips served to riders across the U.S.
Baidu said in an earnings update on Tuesday that its Apollo Go service “provided 3.1 million fully driverless operational rides in the third quarter of 2025,” representing year-over-year growth of 212%.
Musk has been promising that Tesla will “solve” autonomy for years without reaching its goals. The world’s richest person has continued with the lofty pronouncements.
At the company’s 2025 shareholder meeting earlier this month, Musk said the “killer app” for self-driving technology is when people can “text and drive,” or “sleep and drive.”
“Before we allow the car to be driven without paying attention, we need to make sure it’s very safe,” Musk said. “We’re on the cusp of that. I know I’ve said that a few times. We really are at this point.”
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