If you do not see the germ and primitive heartbeat at 7 weeks of pregnancy, you can have another ultrasound examination after 1 week. If you still cannot see it, it is possible that the embryo is developing abnormally. The pregnancy should be terminated if necessary. If the embryonic bud and primitive heartbeat can be seen through ultrasound, the pregnancy can be continued and the diet should be strengthened to avoid second-hand smoke and toxic gases or objects to facilitate the normal growth and development of the embryo and to facilitate eugenics.