how do periods work? How do our bodies know when to start/stop bleeding and how much to let loose on each day?

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how do periods work? How do our bodies know when to start/stop bleeding and how much to let loose on each day?

In: Biology

So, the blood is the lining of the uterus shedding. It builds up throughout the month in case of pregnancy, as a place for the fetus to anchor to basically. At a certain place in the hormone cycle the body realizes “oh, I dont need this” and sheds it. Its not regular blood abd body parts, its that extra “in case of pregnancy” uterine lining that comes out. Basically pretty much as fast as it can, which is not very fast. And then when that extra lining is completely expelled, the period ends and the whole cycle starts over.

In your body hormones are like spam emails allowing parts of your body to communicate with each other. At a certain point in the month, HGC hormone triggers ovulation and then if no pregnancy hormones show up, progesterone hormone level falls. This tells your body that it’s not pregnant, so the uterus sheds its lining.