Alah, baby second pregnancy memang lain sikit! At 26 weeks 1kg is actually on the smaller side, normal range is usually around 760g-900g at that gestation, so worth bringing up with your gynae next appointment untuk dia check if baby's growth is okay or if dates need adjusting. Every pregnancy is different, terutama with second baby, and some mums carry differently, but better safe than sorry kan, our doctor boleh do a proper scan and make sure everything's progressing well untuk both you and baby.