Alah, 838g at 25 weeks tu dalam range yang okay lah, jangan worry sangat! A few of my mum friends yang pregnant around the same time, their babies pun around that mark, so it's normal variation. Tapi kalau you nak peace of mind, best la tanya directly your gynae about the growth chart dia follow, each doctor ada their own reference, so better dia je yang confirm if everything's progressing well for your baby. How you feeling otherwise?