Early pregnancy in addition to the regular gynecological examination, it should determine the intrauterine pregnancy by ultrasound is not normal such as intrauterine pregnancy detection see any signs of exploration in the uterine cavity to the abnormal echo, in combination with other clinical manifestations can diagnosis of ectopic pregnancy it is generally advocated in the early stages of pregnancy is not clear by doing the ultrasound is normal intrauterine pregnancy or twin pregnancy, hydatidiform mole, etc.
Medium-term pregnancy is about 16 weeks of amenorrhea in about a need to do ultrasound, to determine whether fetal malformation and growth is not normal because then found the abnormal fetus, the termination of pregnancy within 20 weeks of amenorrhea, it is more appropriate
Late pregnancy or after 36 weeks amenorrhea, ultrasound can make clear how much amniotic fluid and placental function too much or too little amniotic fluid and placental calcification or dysfunction, should no longer be necessary to carry out Caesarean pregnancy
Can be seen throughout the pregnancy, the early, middle and late once the ultrasound examination is necessary but some people do not clear the purpose of ultrasound, in order to clarify the child's gender, number of hospitals to be repeated at ultrasound examination which the mother infants were negative |
