9 week old hasn't had a BM in 12 days - Page 2
My baby went for days and once for over two weeks (closer to three weeks) without pooping. Took him to the dr and he said he was healthy and happy so not to worry. My daughter pooped roughly every week when she was an infant. My DH and I used to joke that we make poopless babies. If everything else looks good, I wouldn't worry about it.