It is common for pregnant women to experience variations in their baby's movements during the 37th week of pregnancy. As your baby continues to grow, they may run out of space inside the womb, which can lead to a decrease in noticeable movements. However, it is important to pay attention to any significant changes or prolonged periods without movement. If you are concerned, it is always best to consult with your healthcare provider who can perform additional tests such as a non-stress test or ultrasound to ensure your baby's well-being.