Pregnant months do four-dimensional best

A few months pregnant do four-dimensional best? Pregnancy do four-dimensional color Doppler generally recommended to do after five months, that is, pregnant 20 weeks ~26 weeks do four-dimensional color Doppler. Because this stage baby is not small, amniotic fluid is just right, baby easy to move, and easy to rotate fetal position, baby because of poor position to cover themselves. After fetal movement, color Doppler doctors are also easy to find baby deformity. Therefore, choose pregnancy do four-dimensional color Doppler 20 weeks ~26 weeks do. Pregnant month big do four-dimensional color Doppler ultrasound, baby easy to block themselves, color Doppler ultrasound doctor can not see the baby blocked parts, it is not easy to find the baby's deformity.