My DS starting going 4 - 5 days in between poops when he was about 4 weeks old. I knew this was normal since I BF is older sister but I thought it started when she was older. I went to a LC when he was 5 weeks old because he was slow gaining weight, although by the time I got to the LC he was gaining about 1.5 oz a day. (and I should say he finally started gaining when he stopped pooping all the time.)
Anyway the only thing I got out of the visit was the DS needed to poop more so I should take him to our doctor and that he should weigh 13 - 18 oz more than he did at the time. I really did not get any help with our latch problems.
Anyway so I took DS to our naturapth who gave him something even though he had pooped virtually as I was walking out the door to our appointment. She also thought he should be going more until he was a bit older. Anyway since then he has been going every 3 - 4 days and seems perfectly happy. My midwife said oh that is normal, (which I KNEW it was but everyone else keep saying it wasn't normal til they were older.
DS has plenty of wet diapers, is gaining weight at a steady rate now so I am not going to worry about how often he poops unless he goes much past 5 days which he has never done.