My fitness tracker knew I was pregnant before I did

Ravika was celebrating her birthday on holiday with her husband when she got an unusual alert from her fitness tracker. Her Oura ring flagged that her health score was poor. Her heart rate had gone up, her body temperature was elevated and her heart rate variability (HRV) had dropped. Yet Ravika felt completely fine. When the stats hadn't improved a week later, the 34-year-old solicitor from the West Midlands did some research online and found a community of women who all said their fitness trackers had been giving them signs they were pregnant, based on the data the trackers had collected. A week later she had a positive pregnancy test. But following some cramping and a notification on her phone telling her that her body appeared to be under significant strain, she went to the doctor. She was told to come back in 10 days for tests to establish whether the pregnancy was healthy. The wait was agonising - and led to her anxiously checking her fitness tracker stats, waking up at 4am every night "just to refresh my app to see if my stats were still low, if my temperature was still elevated. I was holding on to hope that it was a viable pregnancy". The stats, she said, became an "obsess