A fetal heart rate of 151 beats per minute (BPM) at 7 weeks is generally considered within the normal range. The average fetal heart rate during early pregnancy can vary between 120-180 BPM. While some people believe that the fetal heart rate may be an indicator of the baby's gender, there is no scientific evidence to support this claim. The baby's gender is determined by genetic factors and can be accurately determined through ultrasound or genetic testing later in pregnancy. It's important to remember that the most reliable way to assess your baby's health and development is through regular prenatal check-ups with your healthcare provider. If you have any concerns about your baby's heart rate or overall well-being, it is best to consult with your healthcare professional for personalized advice and guidance.