Towards the end of pregnancy, some mothers say that their babies don't move as much. This is typically not true and can be a dangerous assumption.
The quality of your baby's movements will differ. No longer can he or she flip around readily, the uterus has become more cramped as baby fills out in preparation for a healthy birth. Your baby settles in to a birth positions, 97% of the time that is head down or vertex. This leaves little room to move. So while your baby is still moving, you're feeling a different quality of the movements.
It is normal to go from feeling big movements to feeling more squirms, jabs and tickles. This is again, due to decreased space. To help you keep track of fetal movements, the fetal kick count helps. This enables you to report to your doctor or midwife if you notice that your baby truly isn't moving as much as he or she did before, this can be a problematic sign which might indicate the need for more testing, like a non-stress test (NST).
You and Your Baby. American College of Obstetricians and Gynecologists. November 2007.