Add Yahoo as a preferred source to see more of our stories on Google. FotoDuets/Getty Images For many people, a missed period is the first signal that they're pregnant. However, this often isn't the ...

Corrections & Clarifications: An earlier version of this story misstated how to calculate pregnancy duration. It has since been updated. If you think there's a chance you might be pregnant, you want ...

Whether your first sign of impending parenthood was nausea, headaches or just a positive pregnancy test, they're only the start of a long list of things to come. The question is,... Whether your first ...