At 7 weeks pregnant, it may be too early to hear the baby's heartbeat using a stethoscope or Doppler device. However, an ultrasound scan can detect the baby's heartbeat as early as 6 weeks into the pregnancy. During this stage, the heart is already formed and beating, but it may be difficult to hear with external devices. The best way to confirm the presence of a fetal heartbeat is through an ultrasound performed by a healthcare professional. They will use a transvaginal ultrasound probe that provides clearer images in early pregnancy. This procedure is safe and painless, allowing you to see and hear your baby's heartbeat for the first time. If you have concerns about your pregnancy or want reassurance, consult with your healthcare provider who can guide you through this exciting journey.