Ultrasound is done about six times during pregnancy. At 7-8 weeks of menopause, the main purpose is to rule out ectopic pregnancy and to find out the condition of the embryo in the uterus, the presence of fetal heartbeat, and to verify the due date. At 11w-13w+6 days of gestation, the main purpose is to re-check the due date according to the fetal head and hip diameter and to perform early screening for Down’s syndrome by measuring the nuchal translucency. During 22-28 weeks of gestation, the fetus is observed for any abnormalities in the development of various systems and organs. 28-30 weeks of gestation, to understand the condition of the fetus and placenta and amniotic fluid. 36 weeks of gestation, to understand the fetus and placenta and amniotic fluid. At 40 weeks of gestation, the condition of the fetus, placenta and amniotic fluid will be observed.