I think that bowels can be bothered by hormones. 10 mins. prior to a bleed: even if a period wasn't due: I would have to run to the loo, NOW. Otherwise
. Loose motions for about 10 mins. so I couldn't plan any journeys when periods were due. It was a sudden 'attack', no pain just the need to go. NOW!
So it stands to reason that constipation could be a problem too. What happens in pregnancy ........ which is mainly hormonally based?