Apple took one step further into health when it unveiled the Apple Watch Series 8 last month. The new watch includes temperature sensors that can pick up a subtle temperature shift (also called ...

Usually, before ovulation, your BBT ranges from 36.22 to about 36.5 degrees. Two or three days after you ovulate, hormonal changes cause a rise of 0.4 to 1.0 degree in you BBT, which lasts until ...