Our 3-month-old's bowel movements vary from day to day. Sometimes she has several in one day and none the next. Should we be concerned?

The frequency of baby poo is as unpredictable as the stock market. As long as the poo is soft and easy to pass, you don't have to worry too much. Mine can go for three days without a poo, then offload two times in a day. http://www.babycenter.com.au/a551926/your-babys-poo-whats-normal-and-whats-not