I have never heard of birth control pills causing that. There are a lot of things that that could be.

Mucus in the stool is a symptom of irritable bowel syndrome. You can take a look at this digestive.niddk.nih.gov/ddiseases/pubs/ibs _ez/#symptoms and see if you might have other symptoms of ibs.

Here is a whole list of things that can cause mucus to be in your stool: wrongdiagnosis.com/symptoms/mucus_stool/ca uses.htm

So there are a lot of possibilities. It's probably nothing to panic about if it was a one time thing and you don't notice any other changes. I would suggest mentioning it to your doctor the next time you go in though. If you notice other changes or if it happens again, you might want to make an appointment specifically for that just in case.

I'm having the same problem. My symptoms started maybe a month or 2 ago, around he same time I started my birth control pills as well. I am taking Ortho Tri-Cyclen Lo.