関連ワード:  can an ultrasound be wrong    can an ultrasound be wrong about how far along i am    can an ultrasound be wrong about breast cancer    can an ultrasound be wrong about gender    can an ultrasound be wrong about no heartbeat    can an ultrasound be wrong about a miscarriage    can an ultrasound be wrong about heartbeat    can an ultrasound be wrong about pregnancy    can an ultrasound be wrong about gender at 20 weeks    can an ultrasound be wrong about gestational age