Trying to have a baby? Trying not have a baby? Now there’s a smartwatch for that, and a smart ring too.
The new Apple Watch Series 8 ($399+) and Ultra ($799), plus the third-generation Oura Ring ($299+), modernize the age-old practice of fertility tracking with advanced temperature sensors. Their accompanying software can detect slight increases in temperature to determine your ovulation, which typically causes a rise of 0.5 to 1 degree Fahrenheit. This is the time of the month when you are most likely to get pregnant.
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