If the placenta is found to be low during the NT test, no special treatment is needed. Because the NT test is an ultrasound test performed within 11-14 weeks, the placenta may be relatively low at this time because the gestational week is still small and the uterus is relatively small. However, most of the low placenta position indicated by ultrasound is temporary, and many of them will grow up in the later stage as the pregnancy week grows, so there is no need to be overly nervous and anxious, and it is recommended that pregnant mothers should pay attention to rest, not to have intercourse, and to overexert themselves. After 28 weeks of gestation, the placenta will be diagnosed as low lying only if the position of the placenta still suggests that it is relatively low.