A slight amount of mucus is normal in stools. If you are breastfeeding
your baby, then she can have up to 7-10 golden yellow stools which appear like small dots against a slight liquidy background. The stain should be about 3-4 inches big on the diaper. If your baby is only passing a stool every 3rd day, as you have written, you should not worry at all. Also, if you are concerned, you can collect a little of that stool in a small plastic jar and submit it to a lab for a "Routine" stool study. Do let me know if you do this, so that I can guide you further.
- Dr. Taher Kagalwala