https://techcrunch.com/2022/09/07/apple-introduces-the-apple-watch-series-8-with-a-temperature-sensor-crash-detection-and-more/

Apple today introduced a new version of its Apple Watch, the anticipated Apple Watch Series 8, which replaces the prior Series 7 model. The big additions to this upgraded version include a new temperature sensor focused on women’s health, a crash detection feature, a new low-power mode option, and international roaming.

The temperature sensor is a timely arrival given the overturning of Roe v. Wade. With this feature, women can track their ovulation as a retrospective estimate, Apple says. This feature takes advantage of the Series 8’s new two-sensor design. The watch includes one temperature sensor on the back crystal near your skin and another just under the display. This design is meant to minimize bias from the outside environment, the company noted.