How many weeks pregnant can you do four-dimensional ultrasound

How many weeks pregnant can do four-dimensional color Doppler ultrasound. Generally do four-dimensional color Doppler ultrasound, it is recommended to be pregnant 20 weeks to 26 weeks or so to do, generally the best 22 weeks to 24 weeks or so to do. Pregnancy do four-dimensional color Doppler ultrasound is mainly to check the baby's deformity, is a large row of abnormal. After finishing four-dimensional color Doppler ultrasound, do three-dimensional color Doppler ultrasound screening baby's heart deformity between 28 weeks to 32 weeks, that is, supplement the late system ultrasound examination. It is recommended to do regular check-ups at all stages of pregnancy, try to diversify your diet during pregnancy, eat more fresh vegetables and fruits, eat more high-quality protein foods, and eat more coarse fiber foods. Do not stay up late during pregnancy, do not work hard, and do not smoke or drink.