An ultrasound at 19 weeks can generally reveal some fetal malformations. 19 weeks belongs to the middle of pregnancy, generally speaking through the color ultrasound examination ultrasound can see part of the fetal development malformation, such as anencephaly, spina bifida, brain bulging; part of the heart malformation, such as transposition of the great arteries, tetralogy of Fallot, etc., the abdomen can be found out whether there is duodenal atresia; can also observe whether the limbs are short, whether the palms of the hands are missing, and so on. Fetal development during pregnancy is a continuous process, the corresponding gestational weeks have different examinations, it is recommended to carry out regular obstetric examination, the main purpose is to understand the development of the fetus, timely detection of fetal developmental abnormalities and so on. Usually at 12 weeks of pregnancy, ultrasound can be done to measure NT for early screening, and early Down’s syndrome screening can be done to rule out the probability of the fetus suffering from chromosomal malformations. Between 16 and 20 weeks of pregnancy, an intermediate Down’s test can be done, or non-invasive DNA can be done to rule out the possibility of the fetus having a chromosomal abnormality. To summarize, the ultrasound at 19 weeks can only show some fetal malformations, and it is recommended to go to the local hospital for regular checkups to understand the development of the fetus.