New parents become obsessed with their infant's bowel movements (or if we're being polite "BM"). They talk about color, consistency, how often it happens and what makes it happen.

It's not an exact science, but doctors do study what color and frequency changes might mean and take it beyond the usual "bathroom" talk. When should you become worried? WebMD warns:

Don't be frightened by the color changes of BMs. In normal infants, BMs change color as the baby's diet changes, as the digestive tract matures, and as it is populated by new, normal bacteria. It's rare that color changes signal a digestive problem. Usually color changes just mean that there is more or less of the yellow/green/brown/orange pigments that are picked up along the way.

What do you know about poop? Take my quiz and find out.

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