If you're not trying to become pregnant, a late period can be no fun. It's so tough to just be patient and wait for Aunt Flo to show up, so that's where emmenagogues come in. It's a long name for a category of herbs and plants that are believed to induce menstruation. Supposedly they work by stimulating blood flow to a woman's pelvic area. Some of these plants include celery, parsley, yarrow, aloe vera, mugwort, swiss chard, and hemp.
I don't want to put down herbal remedies, but scientifically speaking, the time your period comes is all based on when you ovulate. So if something affected your body from ovulating such as stress or illness then you'll ovulate later, which means your period will also come later. If you do take one of these emmenagogues, and your period comes, it's likely that it's just one big coincidence and your period would have showed up whether you sipped parsley tea or not.
Of course, this is just my opinion so what do you think? Have you ever heard about herbs, essentials oils, foods, or techniques that can induce menstruation? I'd love to hear about them and whether or not they really worked!