At 8 weeks of pregnancy, a fetal heartbeat of 185 beats per minute is within the normal range. The average fetal heart rate during this stage typically ranges from 170 to 200 beats per minute. However, it's important to note that individual variations can occur, and what matters most is consistent growth and development. If you have any concerns about your baby's heartbeat or overall health, it's always best to consult with your healthcare provider who can provide personalized guidance and reassurance.