When Your Fitbit Tells You You're Pregnant

Soon after David got his Fitbit, he said, his wife asked for one too, so he bought her one.

But pretty soon, Ivonne told her husband something strange.

The device was recording her resting heart rate at a high range, sometimes up to 110 beats a minute. A normal resting heart rate for an adult is about 60 to 100 beats a minute, according to the Mayo Clinic.

Ivonne assumed the device was faulty, so she asked her husband to take a look at it.