The difference between three-dimensional and four-dimensional pregnant women

Pregnant women do three-dimensional color Doppler ultrasound and four-dimensional color Doppler ultrasound difference is the time is not the same, four-dimensional color Doppler ultrasound generally recommended pregnancy 22 weeks to 26 weeks to do, three-dimensional color Doppler ultrasound generally recommended pregnancy 28 weeks to 32 weeks to do, the time is not the same. Overall three-dimensional or four-dimensional, are screening fetal abnormalities, three-dimensional color Doppler ultrasound month is big, mainly to check the baby's heart malformation, because early pregnancy or mid-term baby heart structure is still very small, there may be missing small heart malformation, so it is recommended to be pregnant 28 weeks to 32 weeks to do a three-dimensional color Doppler ultrasound to check the baby's heart problems.