6 weeks 5 days ultrasound heartbeat July 8, 2019 16 32 64 128 6 weeks 5 days pregnant ultrasound heartbeat 6 weeks 5 days ultrasound no heartbeat 6 weeks 5 days pregnant ultrasound no heartbeat 6 weeks pregnant heartbeat 7 week ultrasound heartbeat 6 weeks embryo heartbeat Ultrasound at 6 weeks 6 weeks 5 days pregnant ultrasound