Final answer:
Morning sickness, fatigue, nausea, and increased salivation are normal findings during pregnancy, caused by hormonal changes.
Step-by-step explanation:
The symptoms described, including morning sickness, fatigue, nausea, and increased salivation, are normal findings during pregnancy. Nausea and vomiting, often called morning sickness, occur due to increased hormone levels and decreased intestinal movement. Fatigue and increased salivation are also common during pregnancy. These symptoms are usually temporary and tend to subside after the first trimester.