My daughter is 2.5 months old and weighs 5kg. Is this weight normal as per her age? And how many times should I breastfeed her and what should be the duration per feed?

A. yes. see in babies not all goes as per text so you have to follow with a good pediatric to decide the duration, frequency of feed n when to start weaning etc. preterm babies need special cate always. that u can't compromise ok. you can get to a good local doctor