Are ducks able to detect that a woman is in her period?

It turns out that both cats and dogs are able to detect menstruation by odor and hormonal levels. Of course, they don't actually have any scientific concept of what's happening in your uterus, but they do know that something is going on. read more

While it's technically not possible to menstruate during pregnancy, many women do experience spotting during their pregnancies and end up mistaking it for their period. Additionally, women who conceive super close to the time they would normally be getting their periods often have what is called "breakthrough bleeding," because their bodies haven't fully adjusted to being pregnant yet. read more