Ay normal lang yan, mama! Premies usually have more frequent poops kasi their digestive system is still maturing, lalo na if formula-fed or mixed fed like baby mo, a few of us have premies din and nakita namin same thing, especially around that 5-week mark, and it's actually a good sign na hindi constipated si baby. Since she's on Enfamil Catch Up and you're pumping kahit konti lang, that combo can make her poop more often, pero as long as hindi hard or may blood, and she's gaining weight, you're doing great! Definitely ask the pedia on Thursday para sa peace of mind, pero based sa experience ng mum friends ko, ito ay usually hindi problema.