Medically reviewed by Kiarra King, M.D. Key Points Expecting twins can rarely cause a false negative pregnancy test due to something called the "hook effect."It's best to test after a missed period ...

When you’re trying to get a confirmation on your pregnancy, the moment when a fertilised egg is implanted in your uterus is ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Pregnancy tests carry a serious amount of weight. So, of course, if you're planning to take one, you want ...