A healthy leap ahead.The most advanced health features.The future of health on your wrist.Going the distance for your health.Apple Watch Series 8 features advanced health sensors and apps . so you can take an ECG .1 measure heart rate and blood oxygen .2 and track temperature changes3 for advanced insights into your menstrual cycle.4 And with Crash Detection . sleep stages tracking . and advanced workout metrics . it helps you stay active . healthy . safe . and connected.Temperature sensor3 provides retrospective ovulation estimates and advance