Once stomach cancer occurs, there may be digestive symptoms such as nausea, vomiting, blood in stool, and even upper abdominal discomfort, fullness, and pain. However, there is a special case, such as the combination of stomach cancer during pregnancy, which can be easily confused with pregnancy symptoms during pregnancy. In other words, it is easy to be misdiagnosed after the combination of gastric cancer in pregnancy, because during pregnancy, there may be symptoms such as nausea, not wanting to eat, loss of appetite, and even some women may experience weight loss, so it is difficult to identify gastric cancer once it occurs. However, the stools of stomach cancer patients during pregnancy may have all the same. Because once stomach cancer occurs, besides symptoms such as upper abdominal discomfort, distension and pain, patients with stomach cancer during pregnancy will have certain differences in their performance areas. Therefore, in terms of stool, pregnant women will not experience changes such as blood in stool and black stool. In contrast, patients with combined gastric cancer will have black stools, and some patients will have vomiting with vomiting blood.