Also: Why Oura Ring 4 is ZDNET's product of the year - besting Samsung ... to estimate when a user has begun ovulation. The physiology method is eating the calendar method's lunch.

Oura has taken steps to validate the accuracy of its Fertile Window feature, using its smart ring in a study to prove its credentials as an ovulation detector. The research, conducted by in-house ...

Some people experience symptoms halfway through their cycle that can indicate they're ovulating. OB-GYNs share what signals ovulation.