During the third trimester of pregnancy, it is common for a baby's heart rate to range between 120 and 160 beats per minute. Therefore, a heart rate of 164 bpm at 32 weeks is generally considered normal. However, it is always best to consult with your healthcare provider for personalized advice and reassurance. They will be able to assess your specific situation and provide any necessary guidance or further tests if needed. Remember that each pregnancy is unique, so trust your healthcare professional to monitor your baby's well-being throughout this exciting journey.