| | Family Health | Babies Health What if you hear the babys heartbeat at 4 weeks? It is highly unlikely to hear a baby's heartbeat at 4 weeks. The earliest the heartbeat can usually be heard is around 6-7 weeks with a transvaginal ultrasound. Babies Health - Related Articles Muscle Stretching Enhancers How to Sterilize Plastic Pop Bottles Prevention of Intestinal Parasites How can you get a job in the disease management department? How to Develop a Hobby At what stage of HIV is Ritanovir used? Childhood Onset Bipolar Disorders