You would be generally able to make out baby movements by 20 weeks...if you are pregnant for first time you might have not appreciated your baby movement... But no movement even after 24 weeks is cautious... You need to consult your obstetrician to check well being of your baby...if you are feeling movements occasionally also its fine as There's no set number of times that you should feel your baby move. So don't worry if you aren't feeling much yet...