In general, once a feeding schedule is more or less established, bowel movement frequencies may vary from more than five times a day to once every two to three days. Every baby is different.
It is not uncommon for baby to poop only once every couple of days.
For your information, here are some signs which indicate that medical advice should be sought include:
- breastfed or formular-fed baby has not had bowel movement for more than three or five days, respectively
- stools are hard and pebbly (instead of soft)
- stools are thin, watery or mucus like
- stools are red or black or white
Information gathered from:
http://www.whattoexpect.com/first-year/ask-heidi/newborn-poop.aspx