Your menstrual cycle affects your gut through a predictable, hormone-driven pattern, and once you know the shape of it, planning around your symptoms gets a lot easier than being surprised by them each month.
Why this happens
Hormones like progesterone and oestrogen rise and fall through your cycle, and both directly affect gut movement and sensitivity. For a broader look at how this plays out week by week, see How Your Hormones Affect Digestion Each Month.
How your cycle affects digestion
The two halves of your cycle pull your gut in opposite directions.
Second half of your cycle
Rising progesterone slows digestion, which is why constipation and bloating are more common in the days before your period.
First days of your period
Hormones drop sharply and prostaglandins rise, which can cause looser stools and cramping.
Two habits that help
- Increase fiber and water slightly in the week before your period to help prevent the constipation that tends to show up then. A handful of gut-friendly snacks makes this an easy habit to keep.
- Note your symptoms alongside your cycle day for two months. That simple record reveals your own pattern, which makes managing it far easier than guessing. Our deeper series on your gut and your period walks through this in more detail.
What to do with this
Track your symptoms against your cycle day for a couple of months, and nudge fiber and water slightly higher in the week before your period starts. Those two small habits are usually enough to take the edge off the constipation and looser stools that follow your hormones each month.
This content is for educational purposes only and is not a substitute for professional medical advice.
